Academic Appointments

  • Assistant Professor, Physics
  • Assistant Professor, Photon Science Directorate

Administrative Appointments

  • Postdoctoral Scholar, Stanford University (2006 - 2010)
  • Assistant Professor, Rice University (2010 - 2011)
  • Assistant Professor - Photon Science, SLAC National Accelerator Laboratory, Stanford University (2011 - Present)
  • Assistant Professor, Physics Department, Stanford University (2011 - Present)

Honors & Awards

  • Terman Fellowship, Stanford University (2012)
  • Sloan Research Fellowship, Alfred P. Sloan Foundation (2012)
  • Young Investigator Award, U.S. Departrment of Energy (2012)

Professional Education

  • Ph.D., Princeton University, Physics (2006)

2016-17 Courses

All Publications

  • Metallic quantum critical points with finite BCS couplings PHYSICAL REVIEW B Raghu, S., Torroba, G., Wang, H. 2015; 92 (20)
  • Spin-triplet superconductivity in a weak-coupling Hubbard model for the quasi-one-dimensional compound Li0.9Mo6O17 PHYSICAL REVIEW B Cho, W., Platt, C., McKenzie, R. H., Raghu, S. 2015; 92 (13)
  • Elastoconductivity as a probe of broken mirror symmetries PHYSICAL REVIEW B Hlobil, P., Maharaj, A. V., Hosur, P., SHAPIRO, M. C., Fisher, I. R., Raghu, S. 2015; 92 (3)
  • Enhanced pairing of quantum critical metals near d=3+1 PHYSICAL REVIEW B Fitzpatrick, A. L., Kachru, S., Kaplan, J., Raghu, S., Torroba, G., Wang, H. 2015; 92 (4)
  • Evidence for a nematic component to the hidden-order parameter in URu2Si2 from differential elastoresistance measurements NATURE COMMUNICATIONS Riggs, S. C., SHAPIRO, M. C., Maharaj, A. V., Raghu, S., Bauer, E. D., Baumbach, R. E., Giraldo-Gallo, P., Wartenbe, M., Fisher, I. R. 2015; 6

    View details for DOI 10.1038/ncomms7425

    View details for Web of Science ID 000352633900009

  • Evidence for a nematic component to the hidden-order parameter in URu2Si2 from differential elastoresistance measurements. Nature communications Riggs, S. C., SHAPIRO, M. C., Maharaj, A. V., Raghu, S., Bauer, E. D., Baumbach, R. E., Giraldo-Gallo, P., Wartenbe, M., Fisher, I. R. 2015; 6: 6425-?


    For materials that harbour a continuous phase transition, the susceptibility of the material to various fields can be used to understand the nature of the fluctuating order and hence the nature of the ordered state. Here we use anisotropic biaxial strain to probe the nematic susceptibility of URu2Si2, a heavy fermion material for which the nature of the low temperature 'hidden order' state has defied comprehensive understanding for over 30 years. Our measurements reveal that the fluctuating order has a nematic component, confirming reports of twofold anisotropy in the broken symmetry state and strongly constraining theoretical models of the hidden-order phase.

    View details for DOI 10.1038/ncomms7425

    View details for PubMedID 25742938

  • Suppression of spontaneous currents in Sr2RuO4 by surface disorder PHYSICAL REVIEW B Lederer, S., Huang, W., Taylor, E., Raghu, S., Kallin, C. 2014; 90 (13)
  • Crisscrossed stripe order from interlayer tunneling in hole-doped cuprates PHYSICAL REVIEW B Maharaj, A. V., Hosur, P., Raghu, S. 2014; 90 (12)
  • Anomalous Fermi-liquid phase in metallic skyrmion crystals PHYSICAL REVIEW B Watanabe, H., Parameswaran, S. A., Raghu, S., Vishwanath, A. 2014; 90 (4)
  • Non-Fermi-liquid behavior of large-N-B quantum critical metals PHYSICAL REVIEW B Fitzpatrick, A. L., Kachru, S., Kaplan, J., Raghu, S. 2014; 89 (16)
  • Tunable coupling of two-dimensional superconductors in bilayer SrTiO3 heterostructures PHYSICAL REVIEW B Inoue, H., Kim, M., Bell, C., Hikita, Y., Raghu, S., Hwang, H. Y. 2013; 88 (24)
  • Particle-hole condensates of higher angular momentum in hexagonal systems PHYSICAL REVIEW B Maharaj, A. V., Thomale, R., Raghu, S. 2013; 88 (20)
  • Non-Fermi-liquid fixed point in a Wilsonian theory of quantum critical metals PHYSICAL REVIEW B Fitzpatrick, A. L., Kachru, S., Kaplan, J., Raghu, S. 2013; 88 (12)
  • Quantum critical metals in d=3+1 dimensions PHYSICAL REVIEW B Mahajan, R., Ramirez, D. M., Kachru, S., Raghu, S. 2013; 88 (11)
  • Band structure effects on the superconductivity in Hubbard models PHYSICAL REVIEW B Cho, W., Thomale, R., Raghu, S., Kivelson, S. A. 2013; 88 (6)
  • Higher angular momentum pairing from transverse gauge interactions PHYSICAL REVIEW B Chung, S. B., Mandal, I., Raghu, S., Chakravarty, S. 2013; 88 (4)
  • Kerr effect as evidence of gyrotropic order in the cuprates PHYSICAL REVIEW B Hosur, P., Kapitulnik, A., Kivelson, S. A., Orenstein, J., Raghu, S. 2013; 87 (11)
  • Spin-orbit coupling in LaAlO3/SrTiO3 interfaces: magnetism and orbital ordering NEW JOURNAL OF PHYSICS Fischer, M. H., Raghu, S., Kim, E. 2013; 15
  • Theory of 'hidden' quasi-1D superconductivity in Sr2RuO4 10TH INTERNATIONAL CONFERENCE ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY (M2S-X) Raghu, S., Chung, S. B., Lederer, S. 2013; 449
  • Optimal T-c of cuprates: The role of screening and reservoir layers PHYSICAL REVIEW B Raghu, S., Thomale, R., Geballe, T. H. 2012; 86 (9)
  • Charge and spin collective modes in a quasi-one-dimensional model of Sr2RuO4 PHYSICAL REVIEW B Chung, S. B., Raghu, S., Kapitulnik, A., Kivelson, S. A. 2012; 86 (6)
  • Field-Induced p-Wave Superconducting State of Mesoscopic Systems PHYSICAL REVIEW LETTERS Huo, J., Chen, W., Raghu, S., Zhang, F. 2012; 108 (25)


    By using Bogoliubov-de Gennes equations, we study superconducting (SC) states in a quasi-two-dimensional system of radius R. It is shown that no vortices exist in s-wave SC samples with R < R(c) ~ ?(0), the T = 0 coherence length. We predict that chiral p-wave states exhibit superconductivity for R < R(c) only in the presence of a vortex with opposite chirality. This induced SC phase is a consequence of nonzero chirality of the pairing order parameter and implies the presence of chiral edge currents. Our study may be applied to sharply probing the pairing symmetry of unconventional superconductors.

    View details for DOI 10.1103/PhysRevLett.108.257002

    View details for Web of Science ID 000305541000015

    View details for PubMedID 23004642

  • Majorana zero modes in a quantum Ising chain with longer-ranged interactions PHYSICAL REVIEW B Niu, Y., Chung, S. B., Hsu, C., Mandal, I., Raghu, S., Chakravarty, S. 2012; 85 (3)
  • Effects of longer-range interactions on unconventional superconductivity PHYSICAL REVIEW B Raghu, S., Berg, E., Chubukov, A. V., Kivelson, S. A. 2012; 85 (2)
  • Thermodynamics of phase formation in the quantum critical metal Sr3Ru2O7 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Rost, A. W., Grigera, S. A., Bruin, J. A., Perry, R. S., Tian, D., Raghu, S., Kivelson, S. A., Mackenzie, A. P. 2011; 108 (40): 16549-16553


    The behavior of matter near zero temperature continuous phase transitions, or "quantum critical points" is a central topic of study in condensed matter physics. In fermionic systems, fundamental questions remain unanswered: the nature of the quantum critical regime is unclear because of the apparent breakdown of the concept of the quasiparticle, a cornerstone of existing theories of strongly interacting metals. Even less is known experimentally about the formation of ordered phases from such a quantum critical "soup." Here, we report a study of the specific heat across the phase diagram of the model system Sr(3)Ru(2)O(7), which features an anomalous phase whose transport properties are consistent with those of an electronic nematic. We show that this phase, which exists at low temperatures in a narrow range of magnetic fields, forms directly from a quantum critical state, and contains more entropy than mean-field calculations predict. Our results suggest that this extra entropy is due to remnant degrees of freedom from the highly entropic state above T(c). The associated quantum critical point, which is "concealed" by the nematic phase, separates two Fermi liquids, neither of which has an identifiable spontaneously broken symmetry, but which likely differ in the topology of their Fermi surfaces.

    View details for DOI 10.1073/pnas.1112775108

    View details for Web of Science ID 000295536000020

    View details for PubMedID 21933961

  • Superconductivity from repulsive interactions in the two-dimensional electron gas PHYSICAL REVIEW B Raghu, S., Kivelson, S. A. 2011; 83 (9)
  • Hidden Quasi-One-Dimensional Superconductivity in Sr2RuO4 PHYSICAL REVIEW LETTERS Raghu, S., Kapitulnik, A., Kivelson, S. A. 2010; 105 (13)


    We show that the interplay between spin and charge fluctuations in Sr?RuO? leads unequivocally to triplet pairing which has a hidden quasi-one-dimensional character. The resulting superconducting state spontaneously breaks time-reversal symmetry and is of the form ? ~(p(x)+ip(y))z(^) with sharp gap minima and a d vector that is only weakly pinned. The superconductor lacks robust chiral Majorana fermion modes along the boundary. The absence of topologically protected edge modes could explain the surprising absence of experimentally detectable edge currents in this system.

    View details for DOI 10.1103/PhysRevLett.105.136401

    View details for Web of Science ID 000282054100009

    View details for PubMedID 21230791

  • Superconductivity in the repulsive Hubbard model: An asymptotically exact weak-coupling solution PHYSICAL REVIEW B Raghu, S., Kivelson, S. A., Scalapino, D. J. 2010; 81 (22)
  • Collective Modes of a Helical Liquid PHYSICAL REVIEW LETTERS Raghu, S., Chung, S. B., Qi, X., Zhang, S. 2010; 104 (11)


    We study low energy collective modes and transport properties of the "helical metal" on the surface of a topological insulator. At low energies, electrical transport and spin dynamics at the surface are exactly related by an operator identity equating the electric current to the in-plane components of the spin degrees of freedom. From this relation it follows that an undamped spin wave always accompanies the sound mode in the helical metal-thus it is possible to "hear" the sound of spins. In the presence of long range Coulomb interactions, the surface plasmon mode is also coupled to the spin wave, giving rise to a hybridized "spin-plasmon" mode. We make quantitative predictions for the spin-plasmon in Bi2Se3, and discuss its detection in a spin-grating experiment.

    View details for DOI 10.1103/PhysRevLett.104.116401

    View details for Web of Science ID 000275802600032

    View details for PubMedID 20366490

  • Microscopic theory of the nematic phase in Sr3Ru2O7 PHYSICAL REVIEW B Raghu, S., Paramekanti, A., Kim, E. A., Borzi, R. A., Grigera, S. A., Mackenzie, A. P., Kivelson, S. A. 2009; 79 (21)
  • Time-Reversal-Invariant Topological Superconductors and Superfluids in Two and Three Dimensions PHYSICAL REVIEW LETTERS Qi, X., Hughes, T. L., Raghu, S., Zhang, S. 2009; 102 (18)


    We construct time-reversal invariant topological superconductors and superfluids in two and three dimensions. These states have a full pairing gap in the bulk, gapless counterpropagating Majorana states at the boundary, and a pair of Majorana zero modes associated with each vortex. The superfluid 3He B phase provides a physical realization of the topological superfluidity, with experimentally measurable surface states protected by the time-reversal symmetry. We show that the time-reversal symmetry naturally emerges as a supersymmetry, which changes the parity of the fermion number associated with each time-reversal invariant vortex and connects each vortex with its superpartner.

    View details for DOI 10.1103/PhysRevLett.102.187001

    View details for Web of Science ID 000265948600056

    View details for PubMedID 19518900

  • Vortex-dynamics approach to the Nernst effect in extreme type-II superconductors dominated by phase fluctuations PHYSICAL REVIEW B Raghu, S., Podolsky, D., Vishwanath, A., Huse, D. A. 2008; 78 (18)
  • Analogs of quantum-Hall-effect edge states in photonic crystals PHYSICAL REVIEW A Raghu, S., Haldane, F. D. 2008; 78 (3)
  • Minimal two-band model of the superconducting iron oxypnictides PHYSICAL REVIEW B Raghu, S., Qi, X., Liu, C., Scalapino, D. J., Zhang, S. 2008; 77 (22)
  • Topological Mott insulators PHYSICAL REVIEW LETTERS Raghu, S., Qi, X., Honerkamp, C., Zhang, S. 2008; 100 (15)


    We consider extended Hubbard models with repulsive interactions on a honeycomb lattice, and the transitions from the semimetal to Mott insulating phases at half-filling. Because of the frustrated nature of the second-neighbor interactions, topological Mott phases displaying the quantum Hall and the quantum spin Hall effects are found for spinless and spin fermion models, respectively. The mean-field phase diagram is presented and the fluctuations are treated within the random phase approximation. Renormalization group analysis shows that these states can be favored over the topologically trivial Mott insulating states.

    View details for DOI 10.1103/PhysRevLett.100.156401

    View details for Web of Science ID 000255117800048

    View details for PubMedID 18518132

  • Theory of the three-dimensional quantum hall effect in graphite PHYSICAL REVIEW LETTERS Bernevig, B. A., Hughes, T. L., Raghu, S., Arovas, D. P. 2007; 99 (14)


    We predict the existence of a three-dimensional quantum Hall effect plateau in a graphite crystal subject to a magnetic field. The plateau has a Hall conductivity quantized at 4e2/variant Planck's over 2pi 1/c0 with c0 the c-axis lattice constant. We analyze the three-dimensional Hofstadter problem of a realistic tight-binding Hamiltonian for graphite, find the gaps in the spectrum, and estimate the critical value of the magnetic field above which the Hall plateau appears. When the Fermi level is in the bulk Landau gap, Hall transport occurs through the appearance of chiral surface states. We estimate the magnetic field necessary for the appearance of the effect to be 15.4 T for electron carriers and 7.0 T for holes.

    View details for DOI 10.1103/PhysRevLett.99.146804

    View details for Web of Science ID 000249974000052

    View details for PubMedID 17930699

  • Nernst effect and diamagnetism in phase fluctuating superconductors PHYSICAL REVIEW LETTERS Podolsky, D., Raghu, S., Vishwanath, A. 2007; 99 (11)


    We study superconducting systems in the regime where superconductivity is destroyed by phase fluctuations. We find that the Nernst effect has a much sharper temperature decay than predicted by Gaussian fluctuations, with an onset temperature that tracks Tc rather than the pairing temperature. We find a close quantitative connection with diamagnetism--the ratio of magnetization to transverse thermoelectric conductivity reaches a fixed value at high temperatures. We interpret measurements on underdoped cuprates in terms of a dilute vortex liquid over a wide temperature range above Tc.

    View details for DOI 10.1103/PhysRevLett.99.117004

    View details for Web of Science ID 000249474700051

    View details for PubMedID 17930464