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SmB6: Kondo Insulator or Exotic Metal?
Abstract
High pressure resistivity and Hall effect measurements on Sm${\mathrm{B}}_{6}$ show that the activation gap \ensuremath{\Delta} vanishes discontinuously between 45 and 53 kbar, yielding at high pressures a mass-enhanced Fermi liquid phase. The low temperature transport is dominated by extended states in the gap with unusual superunitarity scattering properties, and a carrier density which grows almost exponentially with reduced \ensuremath{\Delta}, saturating below 45 kbar near 0.15 electron per unit cell. Our results are inconsistent with hybridization gap models and suggest a striking parallel to Mott-Hubbard insulators.
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Cited by
Colloquium : Topological band theory
Bansil, A., Lin, H., & Das, T. (2016) · Reviews of Modern Physics · doi:10.1103/revmodphys.88.021004 · Cited by 1,587
Neupane, M., Alidoust, N., Xu, S.-Y., Kondo, T., Ishida, Y., Kim, D. J., Liu, C., Belopolski, I., Jo, Y. J., Chang, T.-R., et al. (2013) · Nature Communications · doi:10.1038/ncomms3991 · Cited by 366
Self-citationJiang, J., Li, S., Zhang, T., Sun, Z., Chen, F., Ye, Z. R., Xu, M., Ge, Q. Q., Tan, S. Y., Niu, X. H., et al. (2013) · Nature Communications · doi:10.1038/ncomms4010 · Cited by 291
Robust topological surface state in Kondo insulator SmB6 thin films
Yong, J., Jiang, Y., Usanmaz, D., Curtarolo, S., Zhang, X., Li, L., Pan, X., Shin, J., Takeuchi, I., & Greene, R. L. (2014) · Applied Physics Letters · doi:10.1063/1.4902865 · Cited by 46
Metadata
- Authors
- Cooley, J. C., Aronson, M. C., Fisk, Z., & Canfield, P. C.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1995-02-27
- Volume
- 74
- Issue
- 9
- Pages
- 1629-1632
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2036418587
- Cited by
- 196
- References
- 0
- FWCI
- 3.77
- Type
- journal article
- Language
- en
- Open access
- closed
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- Cooley, J. C., Aronson, M. C., Fisk, Z., & Canfield, P. C. (1995). SmB6: Kondo Insulator or Exotic Metal? Physical Review Letters. https://doi.org/10.1103/physrevlett.74.1629
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