Statement of research interests

I am interested in exploring the ground states and collective properties associated with quantum condensed matter systems.  I have especially been fascinated by correlated electron materials, in which the low energy degrees of freedom behave qualitatively differently than a free electron gas.  The key challenge here lies in understanding the relationship between the microscopic physics and the phenomena which emerge in the long wavelength limit in such systems.  In order to understand this relationship more deeply, it will be essential to confront these problems using a wide variety of theoretical tools, ranging from non-perturbative computational techniques, to low energy effective field theory descriptions of universal properties.    

More specifically, I have sought out problems in 3 distinct areas of condensed matter physics: 1) systems with strong electron-electron interactions, 2) topologically ordered phases of matter, and 3) systems which exhibit the effects of strong spin-orbit coupling.  In my view,  some of the more exciting open problems of the field involve a significant interplay among these areas.  Individuals who wish to learn more concrete details along these directions are encouraged to email me at the above address. 

S. Raghu and S. A. Kivelson "Superconductivity from repulsive interactions in the two dimensional electron gas." Phys. Rev. B In Press

S. Raghu, A. Kapitulnik, and S. A. Kivelson "Hidden Quasi-One-Dimensional Superconductivity in Sr2RuO4." Phys. Rev. Let. 105, 136401 (2010).

S. Raghu, S. A. Kivelson and D. J. Scalapino "Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution." Phys. Rev. B. 81, 224505 (2010).

S. Raghu, Suk Bum Chung, Xiao-Liang Qi, and Shou-Cheng Zhang "Collective modes of a helical liquid." Phys. Rev. Lett. 104, 116401 (2010).

S. Raghu, A. Paramekanti, E.-A. Kim, R. A. Borzi, S. Grigera, A. P. Mackenzie and S. A. Kivelson "Microscopic theory of the nematic phase in Sr3Ru2O7." Phys. Rev. B 79, 214402 (2009).

F. D. M. Haldane and S. Raghu "Possible realization of directional optical waveguides in photonic crystals with broken time-reversal symmetry." Phys. Rev. Lett. 100, 103904 (2008).

S. Raghu and F. D. M. Haldane "Analogs of quantum Hall edge states in photonic crystals." Phys. Rev. A 78, 033834 (2008).

S. Raghu, D. Podolsky, A. Vishwanath, and David A. Huse "Vortex dynamics approach to the Nernst effect in fluctuating superconductors." Phys. Rev. B 78 184520 (2008).

S. Raghu, X.-L. Qi, C. Honerkamp and S.-C. Zhang "Topological Mott insulators." Phys. Rev. Lett. 100, 156401 (2008).

S. Raghu, X.-L. Qi, C.-X. Liu, D. J. Scalapino and S.-C. Zhang "Minimal two-band model for the superconducting Fe-pnictides." Phys. Rev. B 77 220503(R) (2008).

"'Hidden' Quasi-one-dimensional superconductivity in Sr2RuO4." APS March Meeting, Portland, OR. (March 2010)

"Superconductivity in the Hubbard model: an asymptotically exact weak-coupling solution." NORDITA conference on quantum solids, liquids, and gases, Stockholm, Sweden. (August 17,2010)

"Superconductivity in the repulsive Hubbard model: asymptotically exact weak-coupling solutions." California Institute of Technology. (November 22, 2010)

"Superconductivity in the Hubbard model: an asymptotically exact weak-coupling solution." University of California, Los Angeles. (October 6, 2010)

"Superconductivity in the Hubbard model: an asymptotically exact weak-coupling solution." University of California, Berkeley. (September 14, 2010)

"Topological insulators and superconductors: collective effects beyond the single particle limit." University of California, Riverside. (December 1, 2010)

"Nematic order in Sr3Ru2O7." Workshop on Higher temperature superconductivity, Kavli Institute for Theoretical Physics, Santa Barbara, CA. (July, 2009)