Foreward for special issue of philosophical magazine on: topological correlated insulators and SmB₆

References

• E.E. Vainshtein, S.M. Blokhin, and YuB Paderno, X-ray spectral investigation of samarium hexaboride, Sov. Phys. Solid State 6 (1965), pp. 2318–2321.
   Web of Science ®Google Scholar
• A. Menth, E. Buehler, and T.H. Geballe, Magnetic and semiconducting properties of SmB6, Phys. Rev. Lett. 22 (1969), pp. 295–297.10.1103/PhysRevLett.22.295
   Web of Science ®Google Scholar
• R.L. Cohen, M. Eibschütz, and K.W. West, Electronic and magnetic structure of SmB6, Phys. Rev. Lett. 24 (1970), pp. 383–386.10.1103/PhysRevLett.24.383
   Web of Science ®Google Scholar
• M.B. Maple and D. Wohlleben, Nonmagnetic 4f shell in the high-pressure phase of SmS, Phys. Rev. Lett. 27 (1971), pp. 511–515.10.1103/PhysRevLett.27.511
   Web of Science ®Google Scholar
• J.W. Allen, B. Batlogg, and P. Wachter, Large low-temperature Hall effect and resistivity in mixed-valent SmB6, Phys. Rev. B 20 (1979), pp. 4807–4813. This paper reports the first Hall effect data supporting an insulating gap.10.1103/PhysRevB.20.4807
   Web of Science ®Google Scholar
• R.M. Martin and J.W. Allen, Theory of mixed valence: Metals or small gap insulators? J. Appl. Phys. 50 (1979), pp. 7561–7566.10.1063/1.326765
   Web of Science ®Google Scholar
• G. Aeppli and Z. Fisk, Kondo insulators, Comm. Cond. Mat. Phys. 16 (1992), pp. 155–165.
   Google Scholar
• P.S. Riseborough, Heavy fermion semiconductors, Adv. Phys. 49 (2000), pp. 257–320.10.1080/000187300243345
   Web of Science ®Google Scholar
• P. Coleman, Heavy fermions: electrons at the edge of magnetism, in Handbook of Magnetism and Advanced Magnetic Materials, Vol. 1, H. Kronmuller and S. Parkin, eds., Wiley, Hobokan, 2007, pp. 95–148.
   Google Scholar
• N.F. Mott, Rare-earth compounds with mixed valencies, Phil. Mag. 30 (1974), pp. 403–416.10.1080/14786439808206566
   Google Scholar
• The low temperature plateau is mentioned in the text of Ref. [2] and also in the text of J.C. Nickerson, R.M. White, K.N. Lee, R. Bachmann, T.H. Geballe, and G.W. Hull Jr, Physical properties of SmB6, Phys. Rev. B 3 (1971), pp. 2030–2042. Actual data were first shown in Ref. [5].10.1103/PhysRevB.3.2030
   Web of Science ®Google Scholar
• M. Dzero, K. Sun, V. Galitski, and P. Coleman, Topological Kondo insulators, Phys. Rev. Lett. 104 (2010), pp. 106408-1–106408-4.
   Web of Science ®Google Scholar
• M. Dzero, K. Sun, P. Coleman, and V. Galitski, Theory of topological Kondo insulators, Phys. Rev. B 85 (2012), pp. 045130-1–045130-10.
   Google Scholar
• C.L. Kane and E.I. Mele, Z2 topological order and the quantum spin Hall effect, Phys. Rev. Lett. 95 (2005), p. 146802.10.1103/PhysRevLett.95.146802
   PubMed Web of Science ®Google Scholar
• C.L. Kane and E.I. Mele, Quantum spin Hall effect in graphene, Phys. Rev. Lett. 95 (2005), p. 226801.10.1103/PhysRevLett.95.226801
   PubMed Web of Science ®Google Scholar
• B.A. Bernevig, T.L. Hughes, and S.C. Zhang, Quantum spin Hall effect and topological phase transition in HgTe quantum wells, Science 314 (2006), pp. 1757–1761.10.1126/science.1133734
   PubMed Web of Science ®Google Scholar
• B.A. Bernevig and S.C. Zhang, Quantum spin Hall effect, Phys. Rev. Lett. 96 (2006), p. 106802.10.1103/PhysRevLett.96.106802
   PubMed Web of Science ®Google Scholar
• L. Fu, C.L. Kane, and E.I. Mele, Topological insulators in three dimensions, Phys. Rev. Lett. 98 (2007), p. 106803.10.1103/PhysRevLett.98.106803
   PubMed Web of Science ®Google Scholar
• J.E. Moore and L. Balents, Topological invariants of time-reversal-invariant band structures, Phys. Rev. B 75 (2007), p. 121306 (R).10.1103/PhysRevB.75.121306
   Google Scholar
• L. Fu and C.L. Kane, Topological insulators with inversion symmetry, Phys. Rev. B 76 (2007), p. 045302.10.1103/PhysRevB.76.045302
   Web of Science ®Google Scholar
• R. Roy, Z2 classification of quantum spin Hall systems: An approach using time-reversal invariance, Phys. Rev. B 79 (2009), p. 195321.10.1103/PhysRevB.79.195321
   Web of Science ®Google Scholar
• M. König, S. Wiedmann, C. Brüne, A. Roth, H. Buhmann, L.W. Molenkamp, X.-L. Qi, and S.-C. Zhang, Quantum spin Hall insulator state in HgTe quantum wells, Science 318 (2007), pp. 766–770.10.1126/science.1148047
   PubMed Web of Science ®Google Scholar
• D. Hsieh, D. Qian, L. Wray, Y. Xia, Y.S. Hor, R.J. Cava, and M.Z. Hasan, A topological Dirac insulator in a quantum spin Hall phase, Nature 452 (2008), pp. 970–974.10.1038/nature06843
   PubMed Web of Science ®Google Scholar
• Y. Xia, D. Qian, D. Hsieh, L. Wray, A. Pal, H. Lin, A. Bansil, D. Grauer, Y.S. Hor, R.J. Cava, and M.Z. Hasan, Observation of a large-gap topological-insulator class with a single Dirac cone on the surface, Nat. Phys. 5 (2009), pp. 398–402.10.1038/nphys1274
   Web of Science ®Google Scholar
• H. Zhang, C.-X. Liu, X.-L. Qi, X. Dai, Z. Fang, and S.-C. Zhang, Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface, Nat. Phys. 5 (2009), pp. 438–442.10.1038/nphys1270
   Web of Science ®Google Scholar
• D. Hsieh, Y. Xia, L. Wray, D. Qian, A. Pal, J.H. Dil, J. Osterwalder, F. Meier, G. Bihlmayer, C.L. Kane, Y.S. Hor, R.J. Cava, and M.Z. Hasan, Observation of unconventional quantum spin textures in topological insulators, Science 323 (2009), pp. 919–922.10.1126/science.1167733
   PubMed Web of Science ®Google Scholar
• Y.L. Chen, J.G. Analytis, J.-H. Chu, Z.K. Liu, S.-K. Mo, X.L. Qi, H.J. Zhang, D.H. Lu, X. Dai, Z. Fang, S.C. Zhang, I.R. Fisher, Z. Hussain, and Z.-X. Shen, Experimental realization of a three-dimensional topological insulator, Bi2Te3, Science 325 (2009), pp. 178–181.10.1126/science.1173034
   PubMed Web of Science ®Google Scholar
• D. Hsieh, Y. Xia, D. Qian, L. Wray, J.H. Dil, F. Meier, J. Osterwalder, L. Patthey, J.G. Checkelsky, N.P. Ong, A.V. Fedorov, H. Lin, A. Bansil, D. Grauer, Y.S. Hor, R.J. Cava, and M.Z. Hasan, A tunable topological insulator in the spin helical Dirac transport regime, Nature 460 (2009), pp. 1101–1105.10.1038/nature08234
   PubMed Web of Science ®Google Scholar
• M.Z. Hasan and C.L. Kane, Colloquium: Topological insulators, Rev. Mod. Phys. 82 (2010), pp. 3045–3067.10.1103/RevModPhys.82.3045
   Web of Science ®Google Scholar
• J.E. Moore, The birth of topological insulators, Nature 464 (2010), pp. 194–198.10.1038/nature08916
   PubMed Web of Science ®Google Scholar
• X.-L. Qi and S.-C. Zhang, Topological insulators and superconductors, Rev. Mod. Phys. 83 (2011), pp. 1057–1110.10.1103/RevModPhys.83.1057
   Web of Science ®Google Scholar
• T. Takimoto and K.-H. Lee, Topological aspect of Kondo insulator SmB6, Phil. Mag. (2016), pp. 1–11. doi:10.1080/14786435.2016.1198873
   Google Scholar
• P. Schlottmann, Quantum oscillations in the surface states of topological Kondo insulators, Phil. Mag. (2016), pp. 1–12. doi:10.1080/14786435.2016.1178405
   Google Scholar
• S. Rößler, L. Jiao, D.J. Kim, S. Seiro, K. Rasim, F. Steglich, L.H. Tjeng, Z. Fisk, and S. Wirth, Surface and electronic structure of SmB6 through scanning tunneling microscopy, Phil. Mag. (2016), pp. 1–12. doi:10.1080/14786435.2016.1171414
   Google Scholar
• M. Ellguth, C. Tusche, F. Iga, and S. Suga, Momentum microscopy of single crystals with detailed surface characterization, Phil. Mag. (2016), pp. 1–23. doi:10.1080/14786435.2016.1185185
   Google Scholar
• S. Gabánia, M. Orendáča, G. Pristáša, E. Gažoa, P. Dikoa, S. Piovarčia, V. Glushkovb, N. Sluchankob, A. Levchenkoc, N. Shitsevalovac, and K. Flachbart, Transport properties of variously doped SmB6, Phil. Mag. (2016), pp. 1–10. doi:10.1080/14786435.2016.1177225
   Google Scholar
• P. Lutz, M. Thees, T.R.F. Peixoto, B.Y. Kang, B.K. Cho, C.H. Min, and F. Reinert, Valence characterization of the subsurface region in SmB6, Phil. Mag. (2016), pp. 1–15. doi:10.1080/14786435.2016.1192724
   Google Scholar
• Strongly Correlated Topological Insulators: SmB₆ and Beyond, International Conference held June 2–5, 2015 in Ann Arbor, MI, USA. The conference program and videos of talks and discussions, including pedagogical talks for students and postdocs. Available at http://smb6conference.physics.lsa.umich.edu/
   Google Scholar
• S. Wolgast, C. Kurdak, K. Sun, J.W. Allen, D.-J. Kim, and Z. Fisk, Low-temperature surface conduction in the Kondo insulator SmB6, Phys. Rev. B 88 (2013), p. 180405 (R); first report arXiv:1211.5104 (2012).10.1103/PhysRevB.88.180405
   Web of Science ®Google Scholar
• D.J. Kim, S. Thomas, T. Grant, J. Botimer, Z. Fisk, and J. Xia, Surface Hall effect and nonlocal transport in SmB6: Evidence for surface conduction, Sci. Rep. 3 (2013), p. 3150; first report arXiv:1211.6769 (2012).
   PubMed Web of Science ®Google Scholar
• X. Zhang, N.P. Butch, P. Syers, S. Ziemak, R.L. Greene, and J. Paglione, Hybridization, correlation, and in-gap states in the Kondo insulator SmB6, Phys. Rev. X 3 (2013), p. 011011. First report arXiv:1211.5532 (2012).10.1103/PhysRevX.3.011011
   Google Scholar
• E. S. Reich, Hopes surface for exotic insulator, in Nature News, Nature 492 (2012), p. 165.
   PubMed Web of Science ®Google Scholar
• N. Xu, X. Shi, P.K. Biswas, C.E. Matt, R.S. Dhaka, Y. Huang, N.C. Plumb, M. Radovíc, J.H. Dil, E. Pomjakushina, K. Conder, A. Amato, Z. Salman, D. Mc, K. Paul, J. Mesot, H. Ding, and M. Shi, Surface and bulk electronic structure of the strongly correlated system SmB6 and implications for a topological Kondo insulator, Phys. Rev. B 88 (2013), p. 121102 (R).10.1103/PhysRevB.88.121102
   Web of Science ®Google Scholar
• M. Neupane, N. Alidoust, S.-Y. Yu, T. Kondo, Y. Ishida, D.J. Kim, C. Liu, I. Belopolski, Y.J. Jo, T.-R. Chang, H.-T. Jeng, T. Durakiewicz, L. Balicas, H. Lin, A. Bansil, S. Shin, Z. Fisk, and M.Z. Hasan, Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6, Nat. Commun. 4 (2013), pp. 2991–2997.
   PubMed Web of Science ®Google Scholar
• J. Jiang, S. Li, T. Zhang, Z. Sun, F. Chen, Z.R. Ye, M. Xu, Q.Q. Ge, S.Y. Tan, X.H. Niu, M. Xia, B.P. Xie, Y.F. Li, X.H. Chen, H.H. Wen, and D.L. Feng, Observation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission, Nat. Commun. 4 (2013), pp. 3010–3017.
   PubMed Web of Science ®Google Scholar
• N. Xu, H. Ding, and M. Shi, Spin- and angle-resolved photoemission on the topological Kondo insulator candidate: SmB6, J. Phys. Condens. Matter 28 (2016), p. 363001.
   PubMed Web of Science ®Google Scholar
• G. Li, Z. Xiang, F. Yu, T. Asaba, B. Lawson, P. Cai, C. Tinsman, A. Berkley, S. Wolgast, Y.S. Eo, D.-J. Kim, C. Kurdak, J.W. Allen, K. Sun, X.H. Chen, Y.Y. Wang, and Z. Fisk, Two-dimensional Fermi surfaces in Kondo insulator SmB6, Science 346 (2014), pp. 1208–1212.10.1126/science.1250366
   PubMed Web of Science ®Google Scholar
• D.J. Kim, J. Xia, and Z. Fisk, Topological surface state in the Kondo insulator samarium hexaboride, Nat. Mat. 13 (2014), pp. 466–470.
   PubMed Web of Science ®Google Scholar
• T. Takimoto, SmB6: A promising candidate for a topological insulator, J. Phys. Soc. Jpn. 80 (2011), p. 123710.
   Google Scholar
• F. Lu, J. Zhao, H. Weng, Z. Fang, and Xi Dai, Correlated topological insulators with mixed valence, Phys. Rev. Lett. 110 (2013), p. 096401.10.1103/PhysRevLett.110.096401
   PubMed Web of Science ®Google Scholar
• K. Hanzawa, Theory of intermediate-valence states in Sm compounds, J. Phys. Soc. Jpn. 67 (1998), pp. 3151–3158.10.1143/JPSJ.67.3151
   Google Scholar
• J. Kim, K. Kim, C.-J. Kang, S. Kim, H.C. Choi, J.-S. Kang, J.D. Denlinger, and B.I. Min, Termination-dependent surface in-gap states in a potential mixed-valent topological insulator: SmB6, Phys. Rev. B 90 (2014), p. 075131.10.1103/PhysRevB.90.075131
   Google Scholar
• R. Yu, H. Weng, X. Hu, Z. Fang, and X. Dai, Model Hamiltonian for topological Kondo insulator SmB6, New J. Phys. 17 (2015), p. 023012.10.1088/1367-2630/17/2/023012
   Google Scholar
• C.-J. Kang, J. Kim, K. Kim, J.-S. Kang, J.D. Denlinger, and B.I. Min, Band symmetries of mixed-valence topological insulator: SmB6, J. Phys. Soc. Jpn. 84 (2015), p. 024722.10.7566/JPSJ.84.024722
   Google Scholar
• J.D. Denlinger, J.W. Allen, J.-S. Kang, K. Sun, B.-I. Min, D.-J. Kim, and Z. Fisk, SmB6 photoemission: Past and present, JPS Conf. Proc. 3 (2014), p. 017038.
   Google Scholar
• P. Hlawenka, K. Siemensmeyer, E. Weschke, A. Varykhalov, J. Sánchez-Barriga, N.Y. Shitsevalova, A.V. Dukhnenko, V.B. Filipov, S. Gabáni, K. Flachbart, O. Rader, and E.D.L. Rienks, Samarium Hexaboride: A Trivial Surface Conductor, 2015. Available at arXiv:1502.1542.
   Google Scholar
• N. Xu, P.K. Biswas, J.H. Dil, R.S. Dhaka, G. Landolt, S. Muff, C.E. Matt, X. Shi, N.C. Plumb, M. Radovic, E. Pomjakushina, K. Conder, A. Amato, S.V. Borisenko, R. Yu, H.-M. Weng, Z. Fang, X. Dai, J. Mesot, H. Ding, and M. Shi, Direct observation of the spin texture in SmB6 as evidence of the topological Kondo insulator, Nat. Commun. 5 (2014), p. 4566.
   PubMed Web of Science ®Google Scholar
• N. Xu, C.E. Matt, E. Pomjakushina, J.H. Dil, G. Landolt, J.-Z. Ma, X. Shi, R.S. Dhaka, N.C. Plumb, M. Radovic, V.N. Strocov, T.K. Kim, M. Hoesch, K. Conder, J. Mesot, H. Ding, and M. Shi, Surface vs Bulk Electronic Structures of a Moderately Correlated Topological Insulator YbB₆ Revealed by ARPES, 2014. Available at arXiv:1405.0165.
   Google Scholar
• C.-J. Kang, J.D. Denlinger, J.W. Allen, C.-H. Min, F. Reinert, B.Y. Kang, B.K. Cho, J.-S. Kang, J.H. Shim, and B.I. Min, Electronic structure of YbB6: Is it a topological insulator or not?, Phys. Rev. Lett. 116 (2016), p. 116401.10.1103/PhysRevLett.116.116401
   PubMed Web of Science ®Google Scholar
• S. Rößler, T.-H. Jang, D.-J. Kim, L.H. Tjeng, Z. Fisk, F. Steglich, and S. Wirth, Hybridization gap and Fano resonance in SmB6, Proc. Nat. Acad. Sci. USA 111 (2014), pp. 4798–4802.
   PubMed Web of Science ®Google Scholar
• W. Ruan, C. Ye, M. Guo, F. Chen, X. Chen, G.-M. Zhang, and Y. Wang, Emergence of a coherent in-gap state in the SmB6 Kondo insulator revealed by scanning tunneling spectroscopy, Phys. Rev. Lett. 112 (2014), p. 136401.10.1103/PhysRevLett.112.136401
   PubMed Web of Science ®Google Scholar
• M.M. Yee, Y. He, A. Soumyanarayanan, D.-J. Kim, Z. Fisk, and J.E. Hoffman, Imaging the Kondo Insulating Gap on SmB₆, 2013. Available at arXiv:1308.1085.
   Google Scholar
• Z.-H. Zhu, A. Nicolaou, G. Levy, N.P. Butch, P. Syers, X.F. Wang, J. Paglione, G.A. Sawatzky, I.S. Elfimov, and A. Damascelli, Polarity-driven surface metallicity in SmB6, Phys. Rev. Lett. 111 (2013), p. 216402.10.1103/PhysRevLett.111.216402
   PubMed Web of Science ®Google Scholar
• E. Frantzeskakis, N. de Jong, B. Zwartsenberg, Y.K. Huang, Y. Pan, X. Zhang, J.X. Zhang, F.X. Zhang, L.H. Bao, O. Tegus, A. Varykhalov, A. de Visser, and M.S. Golden, Kondo hybridization and the origin of metallic states at the (0 0 1) surface of SmB6, Phys. Rev. X 3 (2013), p. 041024.
   Google Scholar
• Y. Luo, H. Chen, J. Dai, Z.-A. Xu, and J.D. Thompson, Heavy surface state in a possible topological Kondo insulator: Magnetothermoelectric transport on the (0 1 1) plane of SmB6, Phys. Rev. B 91 (2015), p. 075130.10.1103/PhysRevB.91.075130
   Google Scholar
• R. Peters, T. Yoshida, H. Sakakibara, and N. Kawakami, Coexistence of light and heavy surface states in a topological multiband Kondo insulator, Phys. Rev. B 93 (2016), p. 235159.10.1103/PhysRevB.93.235159
   Web of Science ®Google Scholar
• S. Wolgast, Y.S. Eo, T. Öztürk, G. Li, Z. Xiang, C. Tinsman, T. Asaba, B. Lawson, F. Yu, J.W. Allen, K. Sun, L. Li, and C. Kurdak, Magnetotransport measurements of the surface states of samarium hexaboride using Corbino structures, Phys. Rev. B 92 (2015), p. 115110.10.1103/PhysRevB.92.115110
   Web of Science ®Google Scholar
• P. Syers, D. Kim, M.S. Fuhrer, and J. Paglione, Tuning bulk and surface conduction in the proposed topological kondo insulator SmB6, Phys. Rev. Lett. 114 (2015), p. 096601.10.1103/PhysRevLett.114.096601
   Google Scholar
• W.A. Phelan, S.M. Koohpayeh, P. Cottingham, J.A. Tutmaher, J.C. Leiner, M.D. Lumsden, C.M. Lavelle, X.P. Wang, C. Hoffmann, M.A. Siegler, N. Haldolaarachchige, D.P. Young, and T.M. McQueen, On the chemistry and physical properties of flux and floating zone grown SmB6 single crystals, Sci. Rep. 6 (2016), p. 20860.10.1038/srep20860
   PubMed Web of Science ®Google Scholar
• T. Kasuya, M. Kasaya, K. Takegahara, T. Fujita, T. Goto, A. Tamaki, M. Takigawa, and H. Yasuoka, Mechanisms for anomalous properties in SmB6, J. Magnet. Magnet. Mater. 31–34 (1983), pp. 447–450.10.1016/0304-8853(83)90315-3
   Web of Science ®Google Scholar
• K. Flachbart, K. Gloos, E. Konovalova, Y. Paderno, M. Reiffers, P. Samuely, and P. Svec, Energy gap of intermediate-valent SmB6 studied by point-contact spectroscopy, Phys. Rev. B 64 (2001), p. 085104.10.1103/PhysRevB.64.085104
   Google Scholar
• J. Yong, Y. Jiang, D. Usanmaz, S. Curtarolo, X. Zhang, L. Li, X. Pan, J. Shin, I. Takeuchi, and R.L. Greene, Robust topological surface state in Kondo insulator SmB6 thin films, Appl. Phys. Lett. 105 (2014), p. 222403.10.1063/1.4902865
   Web of Science ®Google Scholar
• J.C. Cooley, M.C. Aronson, Z. Fisk, and P.C. Canfield, SmB6: Kondo insulator or exotic metal?, Phys. Rev. Lett. 74 (1995), pp. 1629–1632.10.1103/PhysRevLett.74.1629
   PubMed Web of Science ®Google Scholar
• W.A. Phelan, S.M. Koohpayeh, P. Cottingham, J.W. Freeland, J.C. Leiner, C.L. Broholm, and T.M. McQueen, Correlation between bulk thermodynamic measurements and the low-temperature-resistance plateau in SmB6, Phys. Rev. X 4 (2014), p. 031012.
   Google Scholar
• N. Wakeham, Y.Q. Wang, Z. Fisk, F. Ronning, and J.D. Thompson, Surface state reconstruction in ion-damaged SmB6, Phys. Rev. B 91 (2015), p. 085107.10.1103/PhysRevB.91.085107
   Google Scholar
• S. Wolgast, Y.S. Eo, C. Kurdak, D.-J. Kim, and Z. Fisk, Conduction through Subsurface Cracks in Bulk Topological Insulators, 2015. Available at arXiv:1506.08233.
   Google Scholar
• Y. Nakajima, P. Syers, X. Wang, R. Wang, and J. Paglione, One-dimensional edge state transport in a topological Kondo insulator, Nat. Phys. 12 (2016), pp. 213–217.
   Web of Science ®Google Scholar
• J.D. Denlinger, J.W. Allen, J.-S. Kang, K. Sun, J.-W. Kim, J.H. Shim, B.I. Min, D.-J. Kim, and Z. Fisk, Temperature dependence of linked gap and surface state evolution in the mixed valent topological insulator SmB6, 2014. Available at arXiv:1312.6637.
   Google Scholar
• C.-H. Min, P. Lutz, S. Fiedler, B.Y. Kang, B.K. Cho, H.-D. Kim, H. Bentmann, and F. Reinert, Importance of charge fluctuations for the topological phase in SmB6, Phys. Rev. Lett. 112 (2014), p. 226402.10.1103/PhysRevLett.112.226402
   PubMed Web of Science ®Google Scholar
• M.Berciu, talk entitled Generic Model and Behavior of a Mixed Valent Compound, and G. A. Sawatzky, discussion on Origin of the Bulk Gap, in Reference [38].
   Google Scholar
• J. Werner and F.F. Assaad, Dynamically generated edge states in topological Kondo insulators, Phys. Rev. B 89 (2014), p. 245119.10.1103/PhysRevB.89.245119
   Web of Science ®Google Scholar
• W.T. Fuhrman, J. Leiner, P. Nikolić, G.E. Granroth, M.B. Stone, M.D. Lumsden, L. DeBeer-Schmitt, P.A. Alekseev, J.-M. Mignot, S.M. Koohpayeh, P. Cottingham, W. Adam Phelan, L. Schoop, T.M. McQueen, and C. Broholm, Interaction driven subgap spin exciton in the Kondo insulator SmB6, Phys. Rev. Lett. 114 (2015), p. 036401.10.1103/PhysRevLett.114.036401
   PubMed Web of Science ®Google Scholar
• W.T. Fuhrman and P. Nikolić, In-gap collective mode spectrum of the topological Kondo insulator SmB6, Phys. Rev. B 90 (2014), p. 195144.10.1103/PhysRevB.90.195144
   Web of Science ®Google Scholar
• G.A. Kapilevich, P.S. Riseborough, X. Gray, M. Gulacsi, T. Durakiewicz, and J. L. Smith, Incomplete protection of the surface Weyl cones of the Kondo insulator SmB6: Spin exciton scattering, Phys. Rev. B 92 (2015), p. 085133.10.1103/PhysRevB.92.085133
   Google Scholar
• W.K. Park, L. Suna, A. Noddings, D.-J. Kim, Z. Fisk, and L.H. Greenea, Topological surface states interacting with bulk excitations in the Kondo insulator SmB6 revealed via planar tunnelling spectroscopy, Proc. Nat. Acad. Sci. 113 (2016), pp. 6599–6604.10.1073/pnas.1606042113
   PubMed Web of Science ®Google Scholar
• S.-K. Mo, J.D. Denlinger, H.-D. Kim, J.-H. Park, J.W. Allen, A. Sekiyama, A. Yamasaki, K. Kadono, S. Suga, Y. Saitoh, T. Muro, P. Metcalf, G. Keller, K. Held, V. Eyert, V.I. Anisimov, and D. Vollhardt, Prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V2O3, Phys. Rev. Lett. 90 (2013), p. 186403.
   Web of Science ®Google Scholar
• V. Alexandrov and P. Coleman, End states in a one-dimensional topological Kondo insulator in large-N limit, Phys. Rev. B 90 (2014), p. 115147.10.1103/PhysRevB.90.115147
   Web of Science ®Google Scholar
• B. Roy, J.D. Sau, M. Dzero, and V. Galitski, Surface theory of a family of topological Kondo insulators, Phys. Rev. B 90 (2014), p. 155314.10.1103/PhysRevB.90.155314
   Web of Science ®Google Scholar
• V. Alexandrov, P. Coleman, and O. Erten, Kondo breakdown in topological Kondo insulators, Phys. Rev. Lett. 114 (2015), p. 177202.10.1103/PhysRevLett.114.177202
   PubMed Web of Science ®Google Scholar
• B. Johansson, Valence state at the surface of rare earth metals, Phys. Rev. B 19 (1979), pp. 6615–6619.10.1103/PhysRevB.19.6615
   Web of Science ®Google Scholar
• L.Z. Liu, J.W. Allen, O. Gunnarsson, N.E. Christensen, and O.K. Andersen, α–γ transition in Ce: A detailed analysis of electron spectroscopy, Phys. Rev. B 45 (1992), pp. 8934–8941.10.1103/PhysRevB.45.8934
   PubMed Web of Science ®Google Scholar
• M. Domke, C. Laubschat, M. Prietsch, T. Mandel, G. Kaindl, and W.D. Schneider, Experimental proof for coordination-dependent valence of Tm metal, Phys. Rev. Lett. 56 (1986), pp. 1287–1290.10.1103/PhysRevLett.56.1287
   PubMed Web of Science ®Google Scholar
• L.H. Tjeng, S.-J. Oh, E.-J. Cho, H.-J. Lin, C.T. Chen, G.-H. Gweon, J.-H. Park, J.W. Allen, T. Suzuki, M.S. Makivic, and D.L. Cox, Temperature dependence of the Kondo resonance in YbAl3, Phys. Rev. Lett. 71 (1993), pp. 1419–1422.10.1103/PhysRevLett.71.1419
   PubMed Web of Science ®Google Scholar
• G.K. Wertheim and G. Crecelius, Divalent surface state on metallic samarium, Phys. Rev. Lett. 40 (1978), pp. 813–816.10.1103/PhysRevLett.40.813
   Web of Science ®Google Scholar
• J.W. Allen, L.I. Johansson, I. Lindau, and S.B. Hagstrom, Surface mixed valence in Sm and SmB6, Phys. Rev. B 21 (1980), pp. 1335–1343.10.1103/PhysRevB.21.1335
   Web of Science ®Google Scholar
• A. Yamasaki, S. Imada, H. Higashimichi, H. Fujiwara, T. Saita, T. Miyamachi, A. Sekiyama, H. Sugawara, D. Kikuchi, H. Sato, A. Higashiya, M. Yabashi, K. Tamasaku, D. Miwa, T. Ishikawa, and S. Suga, Coexistence of strongly mixed-valence and heavy-fermion character in SmOs4Sb12 studied by soft- and hard-X-ray spectroscopy, Phys. Rev. Lett. 98 (2007), p. 156402.10.1103/PhysRevLett.98.156402
   PubMed Web of Science ®Google Scholar
• B.S. Tan, Y.-T. Hsu, B. Zeng, M. Ciomaga Hatnean, N. Harrison, Z. Zhu, M. Hartstein, M. Kiourlappou, A. Srivastava, M.D. Johannes, T.P. Murphy, J.-H. Park, L. Balicas, G.G. Lonzarich, G. Balakrishnan, and S.E. Sebastian, Unconventional Fermi surface in an insulating state, Science 349 (2015), pp. 287–290.10.1126/science.aaa7974
   PubMed Web of Science ®Google Scholar
• O. Erten, P. Ghaemi, and P. Coleman, Kondo breakdown and quantum oscillations in SmB6, Phys. Rev. Lett. 116 (2016), p. 046403.10.1103/PhysRevLett.116.046403
   PubMed Web of Science ®Google Scholar
• Y. Xu, S. Cui, J.K. Dong, D. Zhao, T. Wu, X.H. Chen, K. Sun, H. Yao, and S.Y. Li, Bulk fermi surface of charge-neutral excitations in SmB6 or not: A heat-transport study, Phys. Rev. Lett. 116 (2016), p. 246403.10.1103/PhysRevLett.116.246403
   PubMed Web of Science ®Google Scholar