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Hybridization, Inter-Ion Correlation, and Surface States in the Kondo InsulatorSmB6
Open accessAbstract
As an exemplary Kondo insulator, SmB 6 has been studied for several decades.However, direct evidence for the development of the Kondo coherent state and for the evolution of the electronic structure in the material has not been obtained due to the compound's rather complicated electronic and thermal transport behavior.Recently, these open questions have attracted increasing attention as the emergence of a time-reversal-invariant topological surface state in the Kondo insulator has been suggested.Here, we use point-contact spectroscopy to reveal the temperature dependence of the electronic states in SmB 6 .We demonstrate that SmB 6 is a model Kondo insulator: Below 100 K, the conductance spectra reflect the Kondo hybridization of Sm ions, but, below about 30 K, signatures of inter-ion correlation effects clearly emerge.Moreover, we find evidence that the low-temperature insulating state of this exemplary Kondo-lattice compound harbors conduction states on the surface, in support of predictions of nontrivial topology in Kondo 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
Interacting topological insulators: a review
Rachel, S. (2018) · Reports on Progress in Physics · doi:10.1088/1361-6633/aad6a6 · Cited by 382
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
Jiang, 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
Interacting fermionic topological insulators/superconductors in three dimensions
Wang, C., & Senthil, T. (2014) · Physical Review B · doi:10.1103/physrevb.89.195124 · Cited by 288
Metadata
- Authors
- Zhang, X., Butch, N. P., Syers, P., Ziemak, S., Greene, R. L., & Paglione, J.
- Venue
- Physical Review X
- Publisher
- American Physical Society (APS)
- Published
- 2013-02-14
- Volume
- 3
- Issue
- 1
- ISSN
- 2160-3308 (ISSN-L)
- OpenAlex
- W2009685364
- Cited by
- 195
- References
- 0
- FWCI
- 21.53
- Type
- journal article
- Language
- en
- Open access
- gold
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- Zhang, X., Butch, N. P., Syers, P., Ziemak, S., Greene, R. L., & Paglione, J. (2013). Hybridization, Inter-Ion Correlation, and Surface States in the Kondo InsulatorSmB6. Physical Review X. https://doi.org/10.1103/physrevx.3.011011
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