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Scholarly Interest Report
         
Qimiao Si
Professor
Harry C. and Olga K. Wiess Professor of Physics and Astronomy
 
e-mail:qmsi@rice.edu
 
  • B.S., University of Science and Technology of China, 1986
  • Ph.D., University of Chicago, 1991
  • Alfred P. Sloan Research Fellow
  • Humboldt Research Award
  • Fellow, Institute of Physics (U.K.)
  • Fellow, American Physical Society
  • Fellow, AAAS (American Association for the Advancement of Science)
  • Phone: 713-348-5204; Fax: 713-348-4150
 
Primary Department
   Department of Physics and Astronomy
Picture
 
Department Affiliations
 
  • Department of Physics and Astronomy
  • Rice Quantum Institute
  • Smalley Institute for Nanoscale Science and Technology
  • Wiess School of Natural Sciences
  •  
    Websites
     Qimiao Si
     Condensed Matter Physics @ Rice University
     Condensed Matter Seminars
     Keck Program in Quantum Materials
     Recent publications - search arxiv.org
     
    Research Areas
     Theoretical Condensed matter physics, specializing in strongly correlated electron systems.
     

    Biographical Sketch

     

    Qimiao Si is the Harry C. and Olga K. Wiess Professor of Physics and Astronomy at Rice University. He came to the United States through the highly selective CUSPEA program in 1986, upon earning his B.S. in Physics from University of Science and Technology of China. He received his Ph.D. in Physics in 1991 from the University of Chicago and subsequently did postdoctoral work at Rutgers University and University of Illinois at Urbana-Champaign. He has been on the faculty of Rice University since 1994 (making the actual move to Rice in 1995, after a year's leave of absence).

    Prof. Si works in the field of theoretical condensed matter physics. His major contributions have been in the area of strongly correlated electron systems, including quantum criticality and emergent quantum phases, magnetic heavy fermion metals, high temperature superconductors, and mesoscopic and disordered electronic systems.


    He is particularly well known for his contributions to the theory of quantum criticality, which concerns the physics of matter undergoing a transition from one quantum state to another. He introduced and developed the theory of local quantum criticality, which involves the notion of critical destruction of Kondo entanglement. The theory goes beyond the Landau framework, and has received extensive support from experiments in magnetic heavy fermion systems. He has made seminal contributions to the young field of iron-pnictides superconductors, contributing broadly to the understanding of electron correlations, quantum criticality, magnetism and superconductivity. He has introduced the Bose-Fermi Kondo model and the method of the extended dynamical mean field theory, and contributed to the early development of the dynamical mean field theory. Other topics he has studied include the spin dynamics of the high temperature cuprate superconductors, metal-insulator transition in disordered and interacting electrons in two dimensions, experimental signatures of spin-charge separation, non-Fermi liquid states in an extended Hubbard model and in quantum impurity systems, and Mott transition between metallic and correlated insulating phases of interacting electrons.


    Prof. Si was named a Sloan Research Fellow in 1996, and received a Cottrell Scholar Award from the Research Corporation for Science Advancement in 1998. He was elected a Fellow of the British Institute of Physics in 2004, the American Physical Society in 2005, and the American Association for the Advancement of Science in 2008. He received a Humboldt Prize from the Alexander von Humboldt Foundation in 2012.


    As of December 2013, he has published over 150 scientific articles (including 15 in Science, Nature, Nature Group Journals and PNAS, and 38 in Physical Review Letters) and has given more than 260 invited talks (including over 130 at conferences) on his research. He has served as a General Member of the Aspen Center for Physics (since 2009) and on the Advisory Editorial Board of Journal of Physics - Condensed Matter (2002-2006), and has co-chaired a number of international conferences, including the 2007 International Conference on Strongly Correlated Electron Systems (SCES'07), a premier and large conference in the area of quantum many-body physics.

     

    Research Statement

     

    Qimiao Si works in theoretical condensed matter physics, with an emphasis on quantum magnetism and superconductivity of strongly correlated electron systems.


    Strongly correlated electron systems are at the forefront of condensed matter physics. Their theoretical description is a challenge that provides rich opportunities for creative research. The fundamental question is how the electrons are organized, and, in particular, whether there are principles that are universal among the various classes of these strongly correlated materials. The overarching goal of the group's research is to seek such principles of universality. Along the way, it is also fascinating to explore the diversity of the phenomena that result from electron correlations.


    One area of Prof. Si's current interest is quantum criticality. He and his collaborators  have advanced a by now well-known theory of local quantum criticality. Developed in the context of magnetic heavy fermion metals, which is a prototype system for quantum phase transitions, this theory features the "beyond-Landau" physics of critical Kondo destruction. A related topic of his recent research addresses novel phases that emerge in the vicinity of quantum critical points. He has also been interested in quantum critical physics in a variety of other contexts.


    Another focus of Prof. Si's current research concerns iron-based superconductors. One important aspect of the work is to address the bad-metal behavior in the normal state, which is attributed to a proximity to delocalization-localization transition. This line of consideration has opened up studies on orbital-selective Mott phenomena. A corollary of this approach is that magnetism is primarily driven by J1-J2 interactions, a notion that he and his collaborators have pioneered. This approach has led them to theoretically predict a magnetic quantum critical point in iso-electronically tuned iron pnictides, which has been verified by extensive recent experiments. Finally, the implications of such magnetic interactions for the unconventional superconductivity is being studied; a recent work along this direction has shown how high Tc superconductivity may develop in the iron chalcogenides with seemingly unfavorable Fermi-surface conditions.


    A variety of other topics in correlated electron systems are of interest to the group. These range from non-Fermi liquid behavior, quantum entanglement in many-body systems, cuprate superconductors,  disordered and interacting electronic systems, metal-insulator transitions, out of equilibrium behavior of electronic systems, spin transport, and the probe of spin-charge separation.


    Representative Publications


    R. Yu, P. Goswami, Q. Si, P. Nikolic, and J-X Zhu, "Superconductivity at the Border of Electron Localization and Itinerancy", Nature Communications 4, 2783 (2013); doi:10.1038/ncomms3783.


    X-Y Feng, J. Dai, C-H Chung, and Q. Si, "Competing topological and Kondo insulator phases on a honeycomb lattice", Phys. Rev. Lett. 111, 016402 (2013).


    R. Yu and Q. Si, "Orbital-selective Mott phase in multi-orbital models for alkaline selenides K(1-x)Fe(2-y)Se2", Phys. Rev. Lett. 110, 146402 (2013).


    J. H. Pixley, S. Kirchner, K. Ingersent and Q. Si, "Kondo destruction and valence fluctuations in an Anderson model", Phys. Rev. Lett. 109, 086403 (2012).


    P. Goswami and Q. Si, "Effects of Berry Phase and Instantons in One Dimensional Kondo-Heisenberg Model", Physical Review Letters 107, 126404 (2011).


    Q. Si and F. Steglich, "Heavy Fermions and Quantum Phase Transitions'', Science 329, 1161  (2010).


    P. Goswami, P. Nikolic, and Q. Si, "Superconductivity in Multi-orbital t-J1-J2 Model and its Implications for Iron Pnictides'', EPL  91, 37006 (2010).


    Q. Si, "Quantum Criticality and Global Phase Diagram of Magnetic Heavy Fermions'', Phys. Status Solidi B247, 476 (2010).


    S. J. Yamamoto and Q. Si, "Metallic Ferromagnetism in the Kondo Lattice", PNAS 107, 15704-15707 (2010).


    J. Dai, Q. Si, J.-X. Zhu, and E. Abrahams, "Iron Pnictides as a New Setting for Quantum Criticality", PNAS 106, 4118 (2009).


    Q. Si and E. Abrahams, "Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides", Physical Review Letters 101, 076401 (2008).


    P. Gegenwart, T. Westerkamp, C. Krellner, Y. Tokiwa, S. Paschen, C. Geibel, F. Steglich, E. Abrahams, and  Q. Si, "Multiple energy scales at a quantum critical point", Science 315, 969-971 (2007)


    S. J. Yamamoto and Q. Si, "Fermi surface and antiferromagnetism in the Kondo lattice: an asymptotically exact solution in d>1 dimensions'', Phys. Rev. Lett. 99, 016401 (2007).


    S. Kirchner, L. Zhu, Q. Si and D. Natelson,  "Quantum Criticality in Ferromagnetic Single-Electron Transistors", PNAS 102, 18824 (2005).


    S. Paschen, T. Luhmann, S. Wirth, P. Gegenwart, O. Trovarelli, C. Geibel, F. Steglich, P. Coleman, and Q. Si, "Hall-effect evolution across a heavy-fermion quantum critical point", Nature 432, 881-885 (2004).


    L. Zhu, M. Garst, A. Rosch and Q. Si, "Universally Diverging Grueneisen Parameter and the Magnetocaloric Effect close to Quantum Critical Points”, Physical Review Letters  91, 066404 (2003).


    Q. Si, S. Rabello, K. Ingersent and J. L. Smith,  "Locally-critical Quantum Phase Transitions in Strongly Correlated Metals'',  Nature 413, 804 (2001).


     

     
    Teaching Areas
     Physics
     
    Selected Publications
     Refereed articles
     

    C. Zhang, Rong Yu, Y. Su, Y. Song, M. Wang, G. Tan, T. Egami, J. A. Fernandez-Baca, E. Faulhaber, Qimiao Si, and P. Dai, "Double spin resonances and gap anisotropy in superconducting Co-underdoped NaFeAs", Phys. Rev. Lett. 111, 207002 (2013).

     
     

    D. D. Khalyavin, D. T. Adroja, P. Manuel, A. Daoud-Aladine, M. Kosaka, K. Kondo,  K. A. McEwen,  J. H. Pixley, and Qimiao Si, "Field-induced long-range magnetic order in the spin-singlet ground state system YbAl3C3: Neutron diffraction study", Phys. Rev. B 87, Rapid Commun., 220406(R) (2013).

     
     

    Emilian M. Nica, Kevin Ingersent, Jian-Xin Zhu, and Qimiao Si, "Quantum critical Kondo destruction in the Bose-Fermi Kondo model with a local transverse field", Phys. Rev. B 88, 014414 (2013)

     
     

    J. H. Pixley, Lili Deng, Kevin Ingersent, and Qimiao Si, "Pairing Correlations Near a Kondo-Destruction Quantum Critical Point", Phys. Rev. Lett., submitted (2013); arXiv:1308.0839.

     
     

    J. H. Pixley, Rong Yu, and Qimiao Si, "Quantum phases of the Shastry-Sutherland Kondo lattice: implications for the global phase diagram of heavy fermion metals", Phys. Rev. Lett., submitted (2013); arXiv:1309.0581.

     
     

    J. H. Pixley, Stefan Kirchner, Kevin Ingersent, and Qimiao Si, "Quantum criticality in the pseudo-gap Bose-Fermi Anderson and Kondo models: Interplay between fermion- and boson-induced Kondo destruction", Phys. Rev. B 88, 245111 (2013).

     
     

    L. Jiao, Y. Chen, Y. Kohama,  E. D. Bauer, J.-X. Zhu, J. Singleton, D. Graf, Z. F. Weng, G. M. Pang, T. Shang, J. L. Zhang, H. O. Lee, T. Park, M. Jaime, J. D. Thompson, F. Steglich, and Q. Si, and H. Q. Yuan, "Multiple quantum phase transitions in a heavy fermion antiferromagnet", Nature Commun., submitted (2014); arXiv:1308.0294.

     
     

    M. Yi, D. H. Lu, R. Yu, S. Riggs, J.-H. Chu, B. Lv, Z. Liu, M. Lu, Y. Cui, M. Hashimoto, S.-K. Mo, Z. Hussain, C. W. Chu, I. R. Fisher, Q. Si, and Z.-X. Shen, "Observation of temperature-induced Crossover to an orbital-selective Mott phase in A(x)Fe(2-y)Se2 (A=K, Rb) superconductors", Phys. Rev. Lett. 110, 067003 (2013).

     
     

    P. Ribeiro, Qimiao Si, and S. Kirchner, "Local quantum criticality out of equilibrium -- effective temperature and scaling in the steady state regime", Europhys. Lett. (EPL) 102, 50001 (2013).

     
     

    Pallab Goswami and Qimiao Si, "Topological defects of Neel order and Kondo singlet formation for Kondo-Heisenberg model on a honeycomb lattice", Phys. Rev. B89, 045124 (2014)

     
     

    Qimiao Si, "Condensed Matter Physics -- Hidden is More", Nature 493, N&V, 619-620 (2013)


    http://dx.doi.org/10.1038/493619a
     
     

    Qimiao Si and Silke Paschen, "Quantum phase transitions in heavy fermion metals and Kondo insulators", Phys. Status Solidi B 250, 425-438 (2013).


    http://dx.doi.org/10.1002/pssb.201300005
     
     

    Qimiao Si, J. H. Pixley, Emilian Nica, Seiji J. Yamamoto, P. Goswami, R. Yu, and S. Kirchner, "Kondo Destruction and Quantum Criticality in Kondo Lattice Systems", J. Phys. Soc. Jpn., in press; arXiv:1312.0764


    http://arxiv.org/abs/1312.0764
     
     

    Rong Yu and Qimiao Si, "Orbital-selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K(1-x)Fe(2-y)Se2", Phys. Rev. Lett. 110, 146402 (2013).

     
     

    Rong Yu, Jian-Xin Zhu and Qimiao Si, "Orbital-dependent effects of electron correlations in microscopic models for iron-based superconductors", Current Opinion in Solid State and Materials Science 17, 65-71 (2013)


    http://dx.doi.org/10.1016/j.cossms.2013.05.003
     
     

    Rong Yu, Jian-Xin Zhu and Qimiao Si, "Orbital-selective superconductivity, gap anisotropy and spin resonance excitations in a multiorbital t-J1-J2 model for iron pnictides", Phys. Rev. B 89, 024509 (2014).

     
     

    Rong Yu, Pallab Goswami, Qimiao Si, Predrag Nikolic, and Jian-Xin Zhu, "Superconductivity at the Border of Electron Localization and Itinerancy", Nature Communications 4, 2783 (2013)


    http://dx.doi.org/10.1038/ncomms3783
     
     

    S. Friedemann, S. Paschen, C. Geibel, S. Wirth, F. Steglich, S. Kirchner, E. Abrahams, and Q. Si, "Comment on `Zeeman-driven Lifshitz transition: A model for the experimentally observed Fermi-surface reconstruction in YbRh2Si2' ", Phys. Rev. Lett. 111, 139701 (2013)

     
     

    X. Lu, H. Gretarsson, R. Zhang, X. Liu, H. Luo, W. Tian, M. Laver, Z. Yamani, Y.-J. Kim, A. H. Nevidomskyy, Qimiao Si, P. Dai, "Avoided quantum criticality and magnetoelastic coupling in BaFe(2-x)Ni(x)As2", Phys. Rev. Lett. 110, 257001 (2013).

     
     

    X.-Y. Feng, J. Dai, C.-H. Chung, and Qimiao Si, "Competing topological and Kondo insulator phases on a honeycomb lattice", Phys. Rev. Lett. 111, 016402 (2013).

     
     

    Y. Luo, L. Pourovskii, S. Rowley, Y. Li, C. Feng, A. Georges, J. Dai, G. H. Cao, Z. A. Xu, Qimiao Si, and N. P. Ong, "Heavy Fermion Quantum Criticality and Destruction of the Kondo Effect in a Nickel Oxypnictide'', Nature Materials, under review (2013).

     
     

    E. Morosan, D. Natelson, Andriy H. Nevidomskyy, and Qimiao Si, "Strongly correlated materials", Advanced Materials 24, 4896-4923 (2012).

     
     

    H. Pfau, S. Hartmann, U. Stockert, P. Sun, S. Lausberg, M. Brando, S. Friedemann, C. Krellner, C. Geibel, S. Wirth, S. Kirchner, E. Abrahams, Qimiao Si, F. Steglich, "Thermal and Electrical Transport across a Magnetic Quantum Critical Point", Nature 484, 493-497 (2012); doi: 10.1038/nature11072.

     
     

    J. Custers, K.-A. Lorenzer, M. Mueller, A. Prokofiev, A. Sidorenko, H. Winkler, A. M. Strydom, Y. Shimura, T. Sakakibara, R. Yu, Q. Si, and S. Paschen, "Destruction of Kondo effect in cubic heavy fermion compound Ce3Pd20Si6", Nature Materials 11, 189-194 (2012); doi:10.1038/nmat3214.

     
     

    J.H. Pixley, S. Kirchner, K. Ingersent and Qimiao Si, "Kondo destruction and valence fluctuations in an Anderson model", Phys. Rev. Lett. 109, 086403 (2012).

     
     

    Oliver Stockert, Stefan Kirchner, Frank Steglich, and Qimiao Si, "Superconductivity in Ce- and U-based `122' heavy-fermion compounds", J. Phys. Soc. Jpn. 81, 011001 (2012); DOI: 10.1143/JPSJ.81.011001.

     
     

    P. Gao, R. Yu, L. Sun, H. Wang, Z. Wang, Q. Wu, M. Fang, G. Chen, J. Guo, C. Zhang, D. Gu, H. Tian, J. Li, J. Liu, Y. Li, X. Li, Qimiao Si, Z. Zhao, "Pressure-induced insulator-metal transition and the pathway towards superconductivity in alkaline iron selenide compounds", PNAS, submitted (2012); arXiv:1209.1340.

     
     

    Rong Yu and Qimiao Si, "U(1) Slave-spin theory and its application to Mott transition in a multi-orbital model for iron pnictides", Phys. Rev. B86, 085104 (2012).

     
     

    Rong Yu, Zhentao Wang, Pallab Goswami, Andriy Nevidomskyy, Qimiao Si, and Elihu Abrahams, "Spin Dynamics of a J1-J2-K Model for the Paramagnetic Phase of Iron Pnictides", Phys. Rev. B86, 085148 (2012).

     
     

    S. Nair, S. Wirth, S. Friedemann, F. Steglich, Q. Si and A. J. Schofield, "Hall effect in heavy-fermion metals", Adv. Phys. 61, 583-664 (2012); http://dx.doi.org/10.1080/00018732.2012.730223.

     
     

    Stefan Kirchner, Kevin Ingersent, and Qimiao Si, "Quantum criticality of the sub-ohmic spin-boson model", Phys. Rev. B85, 075113 (2012); doi: 10.1103/PhysRevB.85.075113.

     
     

    Elihu Abrahams and Qimiao Si, "Quantum criticality in the iron pnictides and chalcogenides", J. Phys.: Condens. Matter 23, 223201 (2011).

     
     

    Jian-Xin Zhu, Rong Yu, A. V. Balatsky, and Qimiao Si, "Local Electronic Structure around a Single Impurity as a Test of Pairing Symmetry in (K,Tl)_yFe_xSe2 Superconductors", Phys. Rev. Lett. 107, 167002 (2011).

     
     

    M. T. Glossop, S. Kirchner, J. H. Pixley, and Qimiao Si, "Critical Kondo destruction in a pseudogap Anderson model: scaling and relaxational dynamics",Phys. Rev. Lett. 107, 076404 (2011)

     
     

    O. Stockert, J. Arndt, E. Faulhaber, C. Geibel, H. S. Jeevan, S. Kirchner, M. Loewenhaupt, K. Schmalzl, W. Schmidt, Qimiao Si, F. Steglich, "Magnetically driven superconductivity in CeCu2Si2", Nature Physics 7, 119-124 (2011).

     
     

    Pallab Goswami and Qimiao Si, "Effects of Berry phase and instantons in one dimensional Kondo-Heisenberg model", Phys. Rev. Lett. 107, 126404 (2011).

     
     

    Pallab Goswami, Rong Yu, Qimiao Si, and Elihu Abrahams, "Spin Dynamics of a J1-J2 Antiferromagnet and its Implications for Iron Pnictides", Phys. Rev. B84, 155108 (2011).

     
     

    Rong Yu and Qimiao Si, "Mott Transition in Multi-Orbital Models for Iron Pnictides", Phys. Rev. B84, 235115 (2011).

     
     

    Rong Yu, Jian-Xin Zhu, Qimiao Si, "Mott transition in Modulated Lattices and Parent Insulator of (K,Tl)_yFe_xSe2 Superconductors", Phys. Rev. Lett. 106, 186401 (2011).

     
     

    Rong Yu, Pallab Goswami, and Qimiao Si, "The magnetic phase diagram of an extended J1-J2 model on a modulated square lattice and its implications for the antiferromagnetic phase of K_yFe_xSe2", Phys. Rev. B84, 094451 (2011).

     
     

    S. Friedemann, N. Oeschler, S. Wirth, C. Krellner, C. Geibel, F. Steglich, S. Paschen, S. Kirchner, and Qimiao Si, "Discontinuous Hall coefficient at the quantum critical point in YbRh2Si2", J. Phys.: Condens. Matter 23, 094216 (2011).

     
     

    S. Friedemann, S. Wirth, S. Kirchner, Q. Si, S. Hartmann, C. Krellner, C. Geibel, T. Westerkamp, M. Brando, and F. Steglich, "Break up of heavy fermions at an antiferromagnetic instability", J. Phys. Soc. Jpn. 80, SA002 (2011).

     
     

    C. de la Cruz, W. Z. Hu, S. Li, Q. Huang, J. W. Lynn, M. A. Green, G. F. Chen, N. L. Wang, H. A. Mook, Qimiao Si, Pengcheng Dai, "Lattice distortion and magnetic quantum phase transitions in CeFeAs(1-x)PxO", Phys. Rev. Lett. 104, 017204 (2010).

     
     

    J.-X. Zhu, R. Yu, H. Wang, L. L. Zhao, M. D. Jones, J. Dai, E. Abrahams, E. Morosan, M. Fang, and Qimiao Si,"Band Narrowing and Mott Localization in Iron Oxychalcogenides La2O2Fe2O(Se,S)2'', Phys. Rev. Lett. 104, 216405 (2010).

     
     

    Nabil Iqbal, Hong Liu, Mark Mezei, and Qimiao Si, "Quantum phase transitions in holographic models of magnetism and superconductors", Phys. Rev. D82, 045002 (2010).

     
     

    Pallab Goswami, Predrag Nikolic, and Qimiao Si, "Superconductivity in Multi-orbital t-J1-J2 Model and its Implications for Iron Pnictides", EPL 91, 37006 (2010).

     
     

    Qimiao Si, "Quantum Criticality and Global Phase Diagram of Magnetic Heavy Fermions", Physica Status Solidi B247, 476-484 (2010); http://arxiv.org/abs/arXiv:0912.0040.

     
     

    Qimiao Si and Frank Steglich, "Heavy Fermions and Quantum Phase Transitions", Science 329, 1161-1166 (2010).

     
     

    S. Friedemann, N. Oeschler, S. Wirth, C. Krellner, C. Geibel, F. Steglich, S. Paschen, S. Kirchner, and Qimiao Si, "Fermi-surface collapse and quantum-dynamical scaling near a quantum critical point", PNAS 107, 14547-14551 (2010).

     
     

    S. Kirchner and Qimiao Si, "On the concept of effective temperature in  current carrying quantum critical states", Phys. Status Solidi B247, 631-634 (2010).; http://arXiv.org/abs/0909.3925

     
     

    Seiji J. Yamamoto and Qimiao Si, "Global Phase Diagram of the Kondo Lattice: From Heavy Fermion Metals to Kondo Insulators", J. Low Temp. Phys. 161, 233-262 (2010).

     
     

    Seiji J. Yamamoto and Qimiao Si, "Metallic Ferromagnetism in the Kondo Lattice'', PNAS 107, 15704-15707 (2010).

     

     
     

    Seiji Yamamoto and Qimiao Si, "Renormalization Group for Mixed Fermion-Boson Systems", Phys. Rev. B81, 205106 (2010).

     
     

    Jianhui Dai, Jian-Xin Zhu, and Qimiao Si, "The f-spin physics of rare-earth iron pnictides: influence of d-electron antiferromagnetic order on heavy fermion phase diagram", Phys. Rev. B 80, 020505(R) (2009).

     
     

    Jianhui Dai, Qimiao Si, Jian-Xin Zhu, and Elihu Abrahams, "Iron pnictides as a new setting for quantum criticality", PNAS 106, 4118-4121 (2009)

     
     

    Qimiao Si, "Iron pnictide superconductors: Electrons on the verge", Nature Physics 5, 629-630 (2009).

     
     

    Qimiao Si, Elihu Abrahams, Jianhui Dai, and Jian-Xin Zhu, "Correlation effects in the iron pnictides", New Journal of Physics 11, 045001 (2009).

     
     

    Stefan Kirchner and Qimiao Si, "Critical Kondo destruction and the violation of the quantum-to-classical mapping of quantum criticality", Physica B 404, 2904-2907 (2009).

     
     

    Stefan Kirchner and Qimiao Si, "Quantum Criticality out of Equilibrium: Steady State in a Magnetic Single-Electron Transistor", Phys. Rev. Lett. 103, 206401 (2009).

     
     

    Stefan Kirchner, Qimiao Si, and Kevin Ingersent, "Finite Size Scaling of Classical Long-Ranged Ising Chains and the Criticality of Dissipative Quantum Impurity Models", Phys. Rev. Lett. 102, 166405 (2009).

     
     

    Jianhui Dai, C. J. Bolech, Qimiao Si, "The Bose-Fermi Kondo Model in an Exactly Solvable Limit." Physica B, 403 (2008) : 1242.

     
     

    Philipp Gegenwart, Qimiao Si, and Frank Steglich "Quantum Criticality in Heavy Fermion Metals." Nature Physics (2008) : 186-197.

     
     

    Qimiao Si, Elihu Abrahams "Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides." Physical Review Letters, 101 (2008) : 076401.

     
     

    Seiji J Yamamoto, Qimiao Si, "Fermi Surface and Magnetism in the Kondo lattice: a Continuum Field Theory Approach." Physica B, 403 (2008) : 1414.

     
     

    Stefan Kirchner, Qimiao Si "Berry Phase and the Breakdown of the Quantum to Classical Mapping for the Quantum Critical Point of the Bose-Fermi Kondo model." Physical Review Letters (2008) : arXiv:0808.2647.In Revision

     
     

    Stefan Kirchner, Qimiao Si "Bose-Fermi Kondo Model with Ising Anisotropy: Cluster-Monte Carlo Approach." Physica B, 403 (2008) : 1199.

     
     

    Stefan Kirchner, Qimiao Si "Magnetic Single-Electron Transistor as a Tunable Model System for Kondo-Destroying Quantum Criticality." Physica B, 403 (2008) : 1189.

     
     

    Stefan Kirchner, Qimiao Si, "Scaling and Enhanced Symmetry at the Quantum Critical Point of the Sub-Ohmic Bose-Fermi Kondo Model." Physical Review Letters, 100 (2008) : 026403.

     
     

    J.-X. Zhu, S. Kirchner, R. Bulla, and Qimiao Si, "Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model." Physical Review Letters, 99 (2007) : 227204(1-4).

     
     

    Jianhui Dai, Qimiao Si, and C. J. Bolech, "The Bose-Fermi Kondo Model with a Singular Dissipative Spectrum: Exact Solutions and their Implications." Physical Review Letters: arXiv:0712.3280.Submitted

     
     

    P. Gegenwart, T. Westerkamp, C. Krellner, Y. Tokiwa, S. Paschen, C. Geibel, F. Steglich, E. Abrahams, and Qimiao Si, "Multiple energy scales at a quantum critical point." Science, 315 (2007) : 969-971.

     
     

    Seiji J. Yamamoto and Qimiao Si, "Fermi surface and antiferromagnetism in the Kondo lattice: an asymptotically exact solution in d>1 dimensions." Physical Review Letters, 99 (2007) : 016401.

     
     

    Jian-Xin Zhu, A. V. Balatsky, T. P. Devereaux, Qimiao Si, J. Lee, K. McElroy, and J. C. Davis, "Fourier-Transformed Local Density of States and Tunneling into a d-Wave Superconductor with Bosonic Modes." Physical Review B, 73 (2006) : 014511.

     
     

    Jian-Xin Zhu, K. McElroy, J. Lee, T. P. Devereaux, Qimiao Si, J. C. Davis, and A. V. Balatsky, "Effects of Pairing Potential Scattering on Fourier-Transformed Inelastic Tunneling Spectra in High-$T_c$ Cuprate Superconductors with Bosonic Modes." Physical Review Letters, 97 (2006) : 177001.

     
     

    Qimiao Si, "Global Magnetic Phase Diagram and Local Quantum Criticality in Heavy Fermion Metals." Physica B, 78 (2006) : 23-27.

     
     

    S. D. Wilson, S. Li, P. Dai, W. Bao, J-H Chung, H. J. Kang, S-H Lee, S. Komiya, Y. Ando, and Qimiao Si, "Evolution of low-energy spin dynamics in the electron-doped high-transition-temperature superconductor Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$." Physical Review B, 74 (2006) : 144514.

     
     

    Qimiao Si, Jian-Xin Zhu, and D. R. Grempel "Magnetic Quantum Phase Transitions in Kondo Lattices." J. Phys.: Condens. Matter, 17 (2005) : R1025-1040.

     
     

    S. Kirchner, L. Zhu, Q. Si, and D. Natelson "Quantum Criticality in Ferromagnetic Single-Electron Transistors." Proc. Natl. Acad. Sci. USA, 102 (2005) : 18824-18829.

     
     

    S. Kirchner, L. Zhu, and Q. Si "Destruction of the Kondo effect in a multi-channel Bose-Fermi Kondo model." Physica B, 359 (2005) : 83-85.

     
     

    Eugene Pivovarov and Q. Si "Transitions from small to large Fermi momenta in a one-dimensional Kondo lattice model." Physical Review B, 69 (2004) : 115104(1)-115104(11).

     
     

    J. Sun, O. Rambow, and Q. Si "Orthogonality Catastrophe in Bose-Einstein Condensates." Physical Review Letters (2004) : submitted; cond-mat/0404590.Submitted

     
     

    J.-X. Zhu, J. Sun, Q. Si, and A. V. Balatsky "Effects of a Collective Spin Resonance Mode on the STM Spectra of D-Wave Superconductors." Physical Review Letters, 92 (2004) : 017002.

     
     

    Lijun Zhu, Stefan Kirchner, Qimiao Si, and Antoine Georges "Quantum critical properties of the Bose-Fermi Kondo Model in a large-N limit." Physical Review Letters, 93 (2004) : 267201.

     
     

    S. A. Grigera, A. J. Schofield, S. Rabello, and Q. Si "Momentum resolved tunneling in a Luttinger Liquid." Physical Review B, 69 (2004) : 245109(1)-245109(8).

     
     

    S. Paschen, T. Luhmann, S. Wirth, P. Gegenwart, O. Trovarelli, C. Geibel, F. Steglich, P. Coleman, and Q. Si "Hall-effect evolution across a heavy-fermion quantum critical point." Nature, 432 (2004) : 881-885.

     
     

    Ya. B. Bazaliy, R. Ramazashvili, Q. Si, and M. R. Norman "Magnetotransport near a quantum critical point in a simple metal." Physical Review B, 69 (2004) : 144423(1)-144423(11).

     
     Book chapters
     

    Q. Si, "Quantum Criticality and the Kondo Lattice'', Chapter in "Understanding Quantum Phase Transitions'', ed. L. D. Carr (Taylor & Francis, Boca Rato, 2011).

     
     Refereed conference papers
     

    F. Steglich, O. Stockert, S. Wirth, C. Geibel, H. Q. Yuan, S. Kirchner, and Q. Si, "Routes to heavy-fermion superconductivity" J. Phys. Conf. Series 449, 012028 (2013).


    http://dx.doi.org/10.1088/1742-6596/449/1/012028
     
     

    Rong Yu, Qimiao Si, Pallab Goswami, and Elihu Abrahams, "Electron Correlation and Spin Dynamics in Iron Pnictides and Chalcogenides", J. Phys.: Conf. Ser. 449, 012025 (2013)


    http://dx.doi.org/10.1088/1742-6596/449/1/012025
     
     

    F. Steglich, J. Arndt, O. Stockert, S. Friedemann, M. Brando, C. Klingner, C. Krellner, C. Geibel, S. Wirth, S. Kirchner and Q. Si, "Magnetism, f-electron localization and superconductivity in 122-type heavy-fermion metals", J. Phys.: Condens. Matter 24, 294201 (2012).

     
     

    J. H. Pixley, Stefan Kirchner, M. T. Glossop and Qimiao Si, "Continuous-Time Monte Carlo study of the pseudogap Bose-Fermi Kondo model", J. Phys.: Conf. Ser. 273, 012019 (2011).

     
     

    Jianda Wu, Lijun Zhu, Qimiao Si, "Entropy accumulation near quantum critical points: effects beyond hyperscaling", J. Phys.: Conf. Ser. 273, 012019 (2011).

     
     Conference papers
     

    Q. Si "Quantum Critical Metals: beyond the Order Parameter Fluctuations." Advances in Solid State Physics, 44 (2004) : 253-264.

     
    Presentations
     Invited Talks
     

    "Electron Correlations and Superconductivity in Iron Pnictides and Chalcogenides", First Cross-Strait Workshop on Novel Quantum Materials, Hualien, Taiwan, Dec. 24-28, 2013.

     
     

    "Electronic Correlations and Quantum Criticality in Iron Pnictides", Sino-German (International) Workshop on Kondo and Mott Physics in Correlated Matter, Hangzhou, China, Oct. 14-17, 2013.

     
     

    "Orbital-Selective Mott Transition in Iron Pnictide Superconductors", Seminar, University of Sherbrooke, Sherbrooke, Canada, April 11, 2013.

     
     

    "Orbital-Selective Mott Transition in Iron Pnictide Superconductors", Condensed Matter Science Colloquium, Los Alamos National Lab, Los Alamos, New Mexico, April 3, 2013

     
     

    "Orbital-selective Correlations and Neutron Resonance Excitations in Iron Pnictide Superconductors", Theoretical and Experimental Magnetism Meeting, Abingdon, UK, July 4-5, 2013

     
     

    "Quantum Criticality -- from Chilled Antiferromagnets to Charged Black Holes", Physikalisches Kolloquium, Karlsruhe Institute of Technology, Germany, May 10, 2013.

     
     

    "Quantum Criticality and Emergent Phases in Heavy Fermion Metals", 2013 Hangzhou Workshop on Quantum Matter, Hangzhou, China, April 22-25, 2013.

     
     

    "Quantum Criticality and Strongly Correlated Electrons", Condensed Matter Seminar, University of California at Santa Cruz, Oct. 4, 2013.

     
     

    "Quantum Criticality and Unconventional Superconductivity", Colloquium, National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing, China, April 26, 2013.

     
     

    "Quantum Criticality and its Implications for Heavy Fermion Superconductivity", Spectroscopy on Novel Superconductors (SNS2013), Berkeley, California, June 24-28, 2013.

     
     

    "Quantum Criticality, Emergent Magnetic Phases and Superconductivity", DOE-CAS Heavy-Fermion Workshop, Los Alamos National Lab., New Mexico, Nov. 18-19, 2013

     
     

    "Quantum Criticality, Magnetic Frustration and Emergent Phases in Heavy Fermion Metals", International Conference on Strongly Correlated Electron SCES-2013, Tokyo, Japan, Aug. 5-9, 2013.

     
     

    "Quantum Phase Transitions and Strongly Correlated Electrons", Physics Colloquium, Universite de Montreal, Montreal, Canada, April 12, 2013

     
     

    "Quantum Phase Transitions in Heavy Fermion Metals and Kondo Insulators", Conference on Quantum Criticality: Experiment and Theory, Freudenstadt-Lauterbad, Germany, Sept. 15-19, 2013.

     
     

    "Quantum Phase Transitions in Heavy Fermion Metals and Kondo Insulators", Aspen Center for Physics Summer Workshop --  Disorder, Dynamics, Frustration and Topology in Quantum Condensed Matter, Aspen, CO, July 9, 2013.

     
     

    "Superconductivity on the Border of Magnetism: Heavy Fermions and Iron Pnictides", NORDITA Workshop on Superconductivity: the Second Century, Stockholm, Sweden, Aug. 20, 2013.

     
     

    "Correlated Electrons at the Border of Magnetism", Institute for Basic Science Symposium: From Observation of Quantum States in Solids to Their Control, Seoul, Korea, Sept. 6, 2012.

     
     

    "Entropy accumulation near quantum critical points", Workshop on Quantum Matter from the Nano- to the Macroscale, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany, June 18-July 6, 2012.

     
     

    "Heavy Fermions and Quantum Phase Transitions: A Theorist's Perspective", International Workshop on Heavy Fermions and Quantum Phase Transitions, IOP, Beijing, China, Nov 10-12, 2012.

     
     

    "Local Quantum Criticality and Emergent Phases", Heavy Fermions Physics: Perspectives and Outlook, Beijing, China, Jan 7-9, 2012.

     
     

    "Magnetism and orbital-selective Mott physics in iron based superconductors", Theoretical and Experimental Magnetism Meeting, Abingdon, UK, June 28-29, 2012.

     
     

    "Orbital-Selective Mott Transition in Iron Pnictide Superconductors", University College London, London Centre for Nanotechnology, London, UK, May 30, 2012.

     
     

    "Orbital-Selective Mott Transition in Iron Pnictide Superconductors", Condensed matter seminar, Texas A&M University, College Station, TX, Oct. 5, 2012.

     
     

    "Quantum Criticality and Emergent Phases in Heavy Fermions", Condensed Matter Colloquium, Los Alamos National Lab, Los Alamos, New Mexico, March 21, 2012.

     
     

    "Quantum Criticality and Novel Phases", DARPA Workshop on Correlated Quantum Materials, Arlington, VA, Nov. 7-8, 2012.

     
     

    "Quantum Criticality and Strongly Correlated Electrons", Colloquium on Solid State Physics, TU Munich, Garching, Germany, Dec. 13, 2012.

     
     

    "Quantum Criticality, Non-Fermi Liquid and Unconventional Superconductivity", 19th International Conference on Magnetism (ICM2012), Busan, Korea, July 8-13, 2012.

     
     

    "Quantum magnetism of heavy fermions and effects of Berry phase", Workshop on Emergent Phases in Correlated and Topological Matter, Hangzhou, China, April 2-5, 2012.

     
     

    "Superconductivity, magnetic interactions and electron correlations in iron pnictides and selenides", Tenth International Conference on Materials and Mechanisms of Superconductivity (M2S 2012), Washington, D.C., USA, July 29-Aug. 3, 2012.

     
     

    "Theory Summary and Perspectives", International Conference on Quantum Criticality and Novel Phases (QCNP12), Dresden, Germany, Aug. 26-29, 2012.

     
     

    "Quantum Criticality and Emergent Phases", Condensed Matter Seminar, Charles University, Praha, Czech Republic, June 1, 2011.

     
     

    "The new iron chalcogenide (K,Tl)FexSe2: pairing strength and symmetries, and some general lessons about iron pnictides", Theoretical and Experimental Magnetism Meeting, Rutherford Appleton Laboratory, UK, June 16-17, 2011.

     
     

    "Electron Correlations and Superconductivity in Iron Pnictides and Selenides", 26th International Conference on Low Temperature Physics (LT26), Beijing, China, Aug. 10-17, 2011.

     
     

    "Electron Correlations and Superconductivity in Iron Pnictides and Selenides", International Workshop on Electronic Correlations in Models and Materials, Augsburg, Germany, Sept 11-15, 2011.

     
     

    "Electron Correlations and Superconductivity in the Iron Pnictides and Selenides", Condensed Matter Seminar, UCLA, Los Angeles, CA, Nov. 9, 2011.

     
     

    "Electron Correlations and Superconductivity in the Iron Pnictides and Selenides", Condensed Matter Seminar, Harvard University, Cambridge, MA, Oct. 13, 2011.

     
     

    "Local quantum criticality, Kondo lattice and holographic models of non-Fermi liquids", Black Hole Answers for Condensed Matter Questions, Lorentz center, Leiden, Netherlands, June 16, 2011.

     
     

    "Quantum Criticality and Emergent Phases", Institute Colloquium, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany, April 18, 2011.

     
     

    "Quantum Criticality and Emergent Phases", ERC Symposium Quantum Puzzle, Vienna, Austria, June 22, 2011.

     
     

    "Quantum Criticality and Emergent Phases", Physikalisches Kolloquium, University Bonn, Germany, April 15, 2011.

     
     

    "Quantum Criticality and Strongly Correlated Electrons", Condensed Matter Seminar, University of Michigan, Ann Arbor, Oct. 11, 2011.

     
     

    "Quantum Criticality and Strongly Correlated Electrons", Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw, Poland, Dec. 8, 2011.

     
     

    "Quantum Criticality and Strongly Correlated Electrons", Chez Pierre Seminar, Massachusetts Institute of Technology, Cambridge, MA, Sept. 26, 2011.

     
     

    "Quantum Magnetism of Heavy Fermions and Effects of Berry Phases", Condensed matter seminar, Boston College, Boston, MA, Oct. 4, 2011.

     
     

    "Quantum critical points and emergent phases in heavy fermion metals", Workshop -- Developments and Prospects in Quantum Impurity Physics, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany, June 5-June 10, 2011.

     
     

    "Quantum critical points and novel phases in heavy fermion metals", APS March Meeting, Dallas, Texas, March 21-25, 2011.

     
     

    "Quantum criticality and emergent phases in heavy fermion metals", Institute of Physics, Chinese Academy of Sciences, Beijing, China, Aug. 10, 2011.

     
     

    "The new iron chalcogenide (K,Tl)FexSe2: pairing strength and symmetries, and some general lessons about iron pnictides", International Institute of Physics (IIP) Workshop on Superconductivity, Natal/RN, Brazil, May 16-30, 2011.

     
     

    "Unconventional Superconductivity and Electron Correlations", Aspen Center for Physics Summer Workshop -- A New Century of Superconductivity: Iron Pnictides and Beyond, Aspen, CO, June 30, 2011.

     
     

    "Closing Comments -- Theoretical", International Conference on Strongly Correlated Electron SCES 2010, Santa Fe, NM, June 27-July 2, 2010.

     
     

    "Magnetism and Electron Correlations in Iron Pnictides", KITP Miniprogram on Iron-Based Superconductors, Kavli Institute for Theoretical Physics, UC Santa Barbara, January 10-21, 2011.

     
     

    "Magnetism and Superconductivity in the Iron Pnictides", Max-Planck Institute for Chemical Physics of Solids, Dresden, Germany, Feb 2, 2010.

     
     

    "Magnetism, Mott Localization and Superconductivity in Fe-based Caompounds", Theoretical and Experimental Magnetism Meeting,    Institute of Physics, Abingdon, UK, Sept. 8-9, 2010.

     
     

    "Quantum Criticality and Global Phase Diagram of Heavy Fermion Metals", 2010 Hangzhou Workshop on Qunatum Matter, Hangzhou, China, May 18-21, 2010.

     
     

    "Quantum Criticality", Discussion Leader, 2010 Gordon Research Conference on Correlated Electron Systems, Mount Holyoke College, South Hadley, MA, June 13-18, 2010.

     
     

    "Quantum Criticality, Kondo Breakdown, and Fermi Surafces", DPG Spring Meeting, Regensburg, Germany, March 21-26, 2010.

     
     

    "Quantum Criticality: Many-Body Systems on the Brink", New Pictures of Strongly Correlated Electron Systems from Large Facilities -- Keith McEwen's 65th Birthday Celebration, University College London, June 4, 2010.

     
     

    "Quantum Phase Transitions and the Border of Magnetism", Physics Colloquium, University of Houston, Houston, Texas, Nov. 9, 2010.

     
     

    "Theoretical Aspects of the Iron Pnictides", International Conference on Magnetic Materials (ICMM 2010), Saha Institute of Nuclear Physics, Kolkata, India, Oct. 25-29, 2010.

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides", APS March Meeting, Pittsburgh, PA, March 16-20, 2009.

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides", KITPC Program on Iron-based High Tc Superconductors, Kavli Institute for Theoretical Physics China, Beijing, China, May 18-June 5, 2009.

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides", University College London, London Centre for Nanotechnology, London, UK, June 18, 2009.

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides", University of Cambridge, Department of Physics, Cavendish Laboratory, U.K., June 25, 2009.

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides'', University of Tokyo, Department of Applied Physics, Tokyo, Japan,  May 20, 2009.

     
     

    "Fermi Surface and Magnetism in Heavy Fermion Metals", Technical University of Vienna, Austria, June 23, 2009.

     
     

    "Fermi Surface and Magnetism in Heavy Fermion Metals"; "Electronic Correlations and Magnetic Frustration in the Iron Pnictides" (two talks), Emergent Quantum Phenomena from the Nano to the Macro World, Cargese, Corsica, France, July 6-19, 2009.

     
     

    "Iron pnictides as a new setting for quantum criticality", Max-Planck Institute for Chemical Physics of Solids, Dresden, Germany, April 2, 2009.

     
     

    "Magnetism and Superconductivity in the Iron Pnictides", CCAST Workshop on Iron Based Superconductors, Beijing, China, Dec 5-6, 2009.

     
     

    "Magnetism and Superconductivity in the Iron Pnictides'', Kyoto University, Kyoto, Japan, Dec 10, 2009.

     
     

    "Magnetism and Superconductivity in the Iron Pnictides'', T-4 Seminar, Los Alamos National Lab, Los Alamos, New Mexico, Nov. 12, 2009.

     
     

    "Magnetism and Superconductivity in the Iron Pnictides", Theoretical and Experimental Magnetism Meeting, Institute of Physics, Abingdon, UK, July 2-3, 2009.

     
     

    "Quantum Criticality in Heavy Fermion Metals'', Condensed matter seminar, Texas A&M University, College Station, TX, Oct. 2, 2009.

     
     

    "Quantum Criticality out of Equilibrium", KITP Program on Low Dimensional Electron Systems, KITP, UC Santa Barbara, May 7, 2009.

     
     

    "Quantum Criticality, Kondo Effect, and Fermi Surfaces", University of Tokyo, Institute for Solid State Physics, Tokyo, Kashiwa, Chiba, May 19, 2009.

     
     

    "Quantum Many-Body Physics and Strongly Correlated Electron Systems'', Physics Colloquium, Beihang University, Beijing, China, Dec 8, 2009.

     
     

    "Superconductivity in the Iron Age'', Colloquium, Department of Physics and Astronomy, Rice University, Houston, TX, Sept. 2, 2009.

     
     

    "Theoretical Overview", Aspen Center for Physics Summer Workshop on Correlated Behavior and Quantum Criticality in Heavy Fermion and related Systems, Aspen, CO, August 11, 2009.

     
     

    "Towards a Global Phase Diagram of Magnetic Heavy Fermions", Hangzhou Workshop on Quantum Matter, Hangzhou, China, Oct. 12-15, 2009.

     
     

    "What is Going on in the Iron Pnictides", TcSUH, University of Houston, April 9, 2009.

     
     

    "Are Iron Pnictides Strongly Correlated." Aspen Center for Physics Summer Workshop on Frontiers of Strongly Correlated Electrons, Aspen, CO. (Aug 7, 2008)

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides." Beijing International Workshop on Iron-(Nickel)-based Superconductors, Institute of Physics, Chinese Academy of Sciences, Beijing, China. (Oct 17-19, 2008)

     
     

    "Electronic Correlations and Magnetic Frustration in the Iron Pnictides." Condensed matter seminar, Iowa State University, Ames, Iowa. (Sept 25, 2008)

     
     

    "Fermi Surface and Magnetism in Kondo Lattice Systems." Workshop on Unconventional Phases and Phase Transitions in Strongly Correlated Electron Systems, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany. (June 2-27, 2008)

     
     

    "Fermi Surface and Magnetism in the Kondo Lattice." 2008 Gordon Research Conference on Correlated Electron Systems, New Biddeford, Maine. (June 8-13, 2008)

     
     

    "Magnetism and Quantum Criticality in Heavy Fermions and Iron Pnictides." ICAM/DCHEM Workshop on Emergent Behavior in Heavy Electron Materials, Aspen, CO. (Aug 28, 2008)

     
     

    "Magnetism in Heavy Fermions and Iron Pnictides." Theoretical and Experimental Magnetism Meeting, Institute of Physics, Abingdon, UK. (July 31-August 1, 2008)

     
     

    "Quantum Criticality beyond Order-Parameter Fluctuations." Aspen Center for Physics 2008 Winter Conference on Condensed Matter: New Horizons in Condensed matter Physics, Aspen, CO. (Feb 3-9, 2008)

     
     

    "Strongly Correlated Electron Systems." Second International Vienna Symposium on Functional Matter: From designer materials to quantum technologies, TU-Wien, Austria. (June 27, 2008)

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." Physics Colloquium, Zhejiang University, Hangzhou,China. (May 6, 2008)

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." Fudan University, Shanghai, China. (May 8, 2008)

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." Center for Advanced Studies, Tsinghua University, Beijing, China. (May 15, 2008)

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." Institute of Physics, CAS, Beijing, China. (May 19, 2008)

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." University of Science and Technology of China, Hefei, China. (April 29, 2008)

     
     

    "Summary Discussion." ICAM Workshop on Fe-pnictide and Related Superconductors, College Park, Maryland. (Nov 16-17, 2008)

     
     

    "Fermi Surface and Antiferromagnetism in Kondo Lattice Systems." Max-Planck Institute for Chemical Physics of Solids, Dresden, Germany. (Feb 12, 2007)

     
     

    "Heavy fermion quantum criticality: Fermi surface and multiple energy scales." Frontiers of Condensed Matter -- Celebrating the research achievements of Elihu Abrahams, Rutgers University, Piscataway, NJ. (April 20-22, 2007)

     
     

    "Local Quantum Criticality: from Heavy Fermions to Magnetic Nanostructures." New Frontiers in Quantum Impurity Physics: From Nano-Structures to Molecular Devices, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany. (August 13-24, 2007)

     
     

    "Local Quantum Criticality: from Heavy Fermions to Nanodevices." NHMFL, Florida State University, Tallahassee, Florida. (Sept 26, 2007)

     
     

    "Local Quantum Criticality: from Heavy Fermions to Nanostructures." Physics Colloquium, Zhejiang University, Hangzhou, China. (July 2, 2007)

     
     

    "Quantum Criticality and Fermi Surfaces." KITPC Program on Quantum Phases of Matter, Kavli Institute for Theoretical Physics China, Beijing, China. (July 6, 2007)

     
     

    "Quantum Criticality and Fermi Surfaces." KITP Program on Strongly Correlated Phases in Condensed Matter and Degenerate Atomic Systems, KITP, UC Santa Barbara, CA. (April 12, 2007)

     
     

    "Quantum Criticality and Strongly Correlated Electrons." Condensed Matter Colloquium, Los Alamos National Lab, Los Alamos, NM. (Oct 3, 2007)

     
     

    "Quantum Criticality and Superconductivity in Heavy Fermions." Aspen Center for Physics Summer Workshop on Novel Aspects of Superconductivity, Aspen, CO. (July 21, 2007)

     
     

    "Quantum Criticality in Correlated Matter." Physics Colloqium, Dartmouth College, Hanover, New Hampshire. (Jan 26, 2007)

     
     

    "Quantum Criticality in Kondo Lattices." ICAM Workshop on 1-1-5 Materials: The Rosetta Stone for the Kondo Lattice, Aspen, CO. (Aug 4, 2007)

     
     

    "Quantum Criticality of Heavy Fermion Metals: Thermodynamic Aspects." National High Magnetic Field Lab, Tallahassee, Florida. (Sept. 27, 2007)

     
     

    "Quantum Criticality, Kondo Effect and Fermi Surfaces." Homage to Daniel Grempel Memorial Conference, CEA-Saclay, France. (June 14-15, 2007)

     
     

    "Quantum Fluctuations, Criticality, and Strongly Correlated Electrons." Workshop on Future Directions in Interacting Electron Physics, Austin, Texas. (Octt 11, 2007)

     
     

    "Quantum Phases and their Transitions in Magnetic Heavy Fermions." The Heavy Fermion Frontier: a Workshop in Honor of Joe D. Thompson's 60th Birthday, Santa Fe, New Mexico. (Nov 12, 2007)

     
     

    "Global Phase Diagram and Quantum Criticality in Magnetic Heavy Fermion Metals." International Conference on Magnetism (ICM2006), Kyoto, Japan. (Aug 20-25, 2006)

     
     

    "Quantum Critical Point beyond Order-Parameter Fluctuations -- the Case of Heavy Fermion Metals." Condensed Matter Seminar, University of California at Riverside, Riverside, CA. (April 12, 2006)

     
     

    "Quantum Criticality." Hangzhou Workshop on Quantum Matter, Hangzhou, China. (Oct 16-19, 2006)

     
     

    "Quantum Criticality." Condensed Matter Seminar, University of Virginia, Charlottesville, Virginia. (Sept 28, 2006)

     
     

    "Quantum Criticality and Fermi-Surface Transformation." Eighth International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-VIII), Dresden, Germany. (July 9-14, 2006)

     
     

    "Quantum Phase Transition and non-Fermi Liquid Behavior." International Conference on Physics Education and Frontier Physics, Taipei, Taiwan. (June 27-30, 2006)

     
     

    "Quantum Phase Transitions and Strongly Correlated Electrons." Physics Colloquium, University of Science and Technology of China, Hefei, China. (July 3, 2006)

     
     

    "Local Quantum Criticality and Fermi-Surface Transformation." Theoretical and Experimental Magnetism Meeting, Institute of Physics and ISIS/CCLRC, Abingdon, UK. (August 2-3, 2005)

     
     

    "Phenomenological Aspects of Local Quantum Criticality." Fifth International Symposium on Advanced Science Research --Advances in the Physics and Chemistry of Actinide Compounds, JAERI Tokai, Ibaraki, Japan (cancelled due to Hurricane Rita). (Sept. 27-29, 2005)

     
     

    "Quantum Criticality in Kondo Systems." Aspen Center for Physics Summer Workshop on Gauge Theories and Fractionalization in Correlated Quantum Matter, Aspen, CO. (August 9, 2005)

     
     

    "Quantum Phase Transition and non-Fermi Liquid Behavior." Conference on Physical Phenomena at High Magnetic Fields-V, National High Magnetic Field Laboratory, Tallahassee, Florida. (August 5-9, 2005)

     
     

    "Quantum Phase Transitions and Correlated Electrons." University College London, London, UK. (March 10, 2005)

     
     

    "Quantum Phase Transitions and Strongly Correlated Electrons." I2CAM Workshop on Chemical Physics of Complex Adaptive Matter, Ringberg Castle (Bavaria), Germany. (February 6 - 9, 2005)

     
     

    "Quantum Phase Transitions and Strongly Correlated Electrons." PHYSICS COLLOQUIUM, Zhejiang University, Hangzhou, China. (Dec. 9, 2005)

     
     

    "The Global Phase Diagram of Magnetic Heavy Fermion Metals." Joint Workshop of NQP (New Quantum Phenomena)-skutterudites and NPM (New Phase of Matter) in multi-approach, Tokyo Metropolitan University, Hachioji, Tokyo. (November 21- 24, 2005)

     
     

    "Two talks: 1) Kondo lattices: What do we learn from microscopics? 2) Heavy fermion metals: Global phase diagram, local quantum criticality, and experiments." Workshop on Emergent Quantum Phases in Strongly Correlated Electron Systems, Korea Institute for Advanced Study (KIAS), Seoul, Korea. (October 24-29, 2005)

     
     

    "Exotic Quantum Criticality in Kondo Lattices." KITP Program on Exotic Order and Criticality in Quantum Matter, KITP, UCSB. (June 30, 2004)

     
     

    "Extended DMFT Study of Kondo Lattices." Workshop on Quantum Criticality and Dynamical Mean Field Theory, SPhT/CEA-Saclay, France. (Dec 7, 2004)

     
     

    "Hall Effect and Fermi Surface Fluctuations near Quantum Critical Points." Theory Seminar, University of karlsruhe, Karlsruhe, Germany. (Feb, 2004)

     
     

    "Local Quantum Critical Points: from Correlated Matters to Mesoscopic Structures." Condensed Matter Seminar, University of Sherbrooke, Sherbrooke, Canana. (March, 2004)

     
     

    "Local Quantum Criticality and Fermi-surface Fluctuations." International Workshop on Materials Science and Nano-Engineering, Osaka, Japan. (Dec 10-14, 2004)

     
     

    "Local Quantum Criticality and non-Fermi Liquid Properties." DPG (Germany Physical Society) Spring Meeting, Regensburg, Germany. (March 8-12, 2004)

     
     

    "Local Quantum Criticality and non-Fermi Liquid Properties." American Physical Society March Meeting, Montreal, Quebec, Canada. (March 22-26, 2004)

     
     

    "Local Quantum Criticality and non-Fermi Liquid Properties." ICTP Workshop on Novel States and Phase Transitions in Highly Correlated Matter, Trieste, Italy. (July 12-23, 2004)

     
     

    "Quantum Critical Metals: beyond Order Parameter Fluctuations." International Workshop on Evolution of Quantum Effects from the Nano-to the Macroscale, Cargese, Corsica, France. (May 17-22, 2004)

     
     

    "Quantum Criticality in Kondo Systems." YKIS 2004 Physics of Strongly Correlated Electron Systems, Yukawa Institute, Kyoto, Japan. (Nov 12-19, 2004)

     
     

    "Quantum Phase Transitions and non-Fermi Liquid Phenomena." WE-Heraeus-Seminar on Quantum Phase Transitions, Bad Honnef, Germany. (October 10-14, 2004)

     
     

    "Quantum Phase Transitions in Kondo Impurities and in Mesoscopic Structures." Condensed Matter Seminar, Cologne University. (Oct 8, 2004)

     
     

    "TURNING UP THE HEAT AT ZERO TEMPERATURE: Quantum Phase Transitions and non-Fermi Liquids." Physics Colloquium, Louisiana State University. (Oct 28, 2004)

     
     

    "TURNING UP THE HEAT AT ZERO TEMPERATURE: Quantum Phase Transitions and non-Fermi Liquids." Physics Colloquium, Rice University. (Nov 10, 2004)

     
     Keynote Speaker
     

    "Magnetism in metals on the verge of Mott transition and quantum criticality in parent pnictides", Keynote Speaker, SEPnet Summer Program: Condensed Matter Physics in the City, London, UK, June 13-14, 2011.

     
     

    "Quantum Criticality, Kondo Breakdown, and Fermi Surfaces", PLENARY TALK, International Conference on Quantum Criticality and Novel Phases (QCNP09), Dresden, Germany, Aug. 2-5, 2009.

     
     

    "Quantum Criticality and Fermi Surface Transformation." PLENARY TALK, International Conference on Strongly Correlated Electron SCES'05, Vienna, Austria. (July 26 - 30, 2005)

     
     Lectures
     

    "Quantum Criticality and Heavy Fermion Physics", Columbia-Rice Frontiers of Condensed Matter Physics Lecture Series, Rice University, Houston, Oct. 22 and 24, 2013 (two lectures).

     
     

    "Quantum Criticality and Strongly Correlated Fermions", Bethe Colloquium, University Bonn, Germany, May 6, 2013.

     
     

    "Quantum Criticality and The Kondo Lattice", Second Fudan Summer School for Condensed Matter Physics -- Quantum Phase Transitions, July 19-22, 2012 (summer school lectures, 4 days, 8 hrs).

     
     

    "Kondo Problem to Heavy Fermions and Local Quantum Criticality", Advanced School -- Developments and Prospects in Quantum Impurity Physics, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany, May 30-June 3, 2011.

     
     

    "Magnetism, Localization and Superconductivity", Inaugural Lecture of Changhiang Professorship, Zhejiang University, Hangzhou, China, Oct. 22, 2010.

     
     

    "Quantum Criticality and Heavy Fermions", Tutorial lecture, Post-Workshop Tutorial-- 2010 Hangzhou Workshop on Qunatum Matter, Hangzhou, China, May 22, 2010.

     
     

    "Strongly Correlated Electrons: from Quantum Criticality to the High Tc Iron Pnictides." Frontiers in Chemical Physics of Solids Lecture, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany. (June 19, 2008)

     
    Editorial Positions
     Member of the Editorial Board, Journal of Physics: Condensed Matter. Institute of Physics (UK). (2005 - 2005)

    Supervised Theses & Dissertations
     Seiji Yamamoto, M.S. Fermi surface and antiferromagnetism in the Kondo lattice. (2006) (Thesis or Dissertation Director)

     Sungbae Lee, Ph.D. Electron Transport in Ferromagnetic Nanostructures. (2007) (Committee Member)

     Enrique Munoz Eavera, Ph.D. Statistical Mechanics of Quasi-species Models. (2008) (Committee Member)

     Seiji J Yamamoto, Ph.D Magnetism and Fermi Surface in Heavy Fermion Metals. (2009) (Thesis or Dissertation Director)

     Tal Einav, B.S. Mott transition in Iron Pnictides. (2012) (Thesis or Dissertation Director)

     Patrick McQuillen, M.S. High Resolution Sculpting and Imaging of Ultracold Neutral Plasmas. (2012) (Committee Member)

     William D. Rice, Ph.D. Low-Energy Charge and Spin Dynamics in Quantum Confined Systems. (2012) (Committee Member)

     Jed Pixley, Ph.D. Quantum Phase Transitions. (Thesis or Dissertation Director)

     Emilian Nica, PhD Quantum Phase transition. (Thesis or Dissertation Director)

     Emilian Nica, PhD Quantum Phase Transitions. (Thesis or Dissertation Director)

     Shezhen Ye, PhD SCHAOTIC IONIZATION OF A RYDBERG ATOM SUBJECTED TO ALTERNATING KICKS. (Committee Member)

     Lei Jiang, PhD Probing and Manipulating Ultracold Fermi Superfluids. (Committee Member)

     Jed Pixley, PhD Quantum Phase Transition. (Thesis or Dissertation Director)

     Tal Einav, B.S. Iron pnictides superconductivity. (Thesis or Dissertation Director)

     Jianda Wu, PhD Quantum Phase Transitions. (Thesis or Dissertation Director)

     Jianda Wu, PhD Quantum phase transitions. (Thesis or Dissertation Director)

     Jed Pixley, Quantum Phase Transitions. (Thesis or Dissertation Director)

     Aliaksandr Krukau, New approaches for incorporating the exact exchange energy density into density functional approximations. (Committee Member)

     Jianda Wu, Quantum phase transitions. (Thesis or Dissertation Director)

    Awards, Prizes, & Fellowships
     Bethe Colloquium, University of Bonn, Germany (May 2013)

     Qianren Short Term Visiting Professor, Institute of Physics, Chinese Academy of Sciences (2012-2015)

     Humboldt Research Award, Alexander von Humboldt Foundation (2012)

     Changjiang Chair Professor, China's Ministry of Education (2010-2012),

     Fellow, American Association for the Advancement of Science (since 2008),

     Frontiers in Chemical Physics of Solids Lecture (Max-Planck Institute-CPfS, 2008), Max-Planck Institute - CPfS, Dresden, Germany (2008)

     Co-Chairman, SCES'07 (2007 International Conference on Strongly Correlated Electron Systems), Houston, May 2007, (May, 2007)

     Cao Guanbiao Professor, Zhejiang University, China, (2007)

     Fellow, American Physical Society, American Physical Society (2005)

     Fellow, Institute of Physics, Institute of Physics, UK (2004)

     Cottrell Scholar Award, Research Corporation (98-03)

     Alfred P. Sloan Research Fellow, Sloan Foundation (96-00)

    Positions Held
     International Advisory Committee, International Conference on Strongly Correlated Electron Systems (SCES'11), Cambridge, UK, August, 2011.. (2011 - 2011)

     Co-Chair, Hangzhou Workshop on Quantum Matter, Hangzhou, Oct. 12-15, 2009. (2009 - 2009)

     Co-organizer, Aspen Center for Physics Summer Workshop on Correlated Behavior and Quantum Criticality in Heavy Fermions and Related Systems, Aspen, CO, Aug. 9 - Sept. 11, 2009. (2009 - 2009)

     Co-Chair, Hangzhou Workshop on Quantum Matter, Hangzhou, April 10-13, 2011.. (2011 - 2011)

     Program Committee, International Conference on Strongly Correlated Electron Systems (SCES'10), Santa Fe, 2010.. (2010 - 2010)

     General Member, Aspen Center for Physics, Aspen Center for Physics. (2013 - 2013)

     International Advisory Committee, International Conference on Materials and Mechanisms of Superconductivity (M2S 2012), Washington DC, July, 2012.. (2011 - 2011)

     International Advisory Committee, 19th International Conference on Magnetism (ICM2012), Busan, Korean, July, 2012.. (2011 - 2011)

     International Advisory Board, International Conference on Quantum Criticality and Novel Phases (QCNP2012), Dresden, Germany, August 26-29, 2012.. (2011 - 2011)

     Corresponding Member (since 2011), Journal Club for Condensed Matter Physics. (2011 - 2011)

     General Member, Aspen Center for Physics. (2012 - 2012)

     Visiting Associate Professor, Dept of Physics, University of Illinois at Urbana-Champaign. (2002 - 2002)