Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2
Abstract/Contents
- Abstract
- The resistance of a conventional insulator diverges as temperature approaches zero. The peculiar low temperature resistivity saturation in the 4f Kondo insulator (KI) SmB6 has spurred proposals of a correlation-driven topological Kondo insulator (TKI) with exotic ground states. However, the scarcity of model TKI material families leaves difficulties in disentangling key ingredients from irrelevant details. Here we use angle-resolved photoemission spectroscopy (ARPES) to study FeSb2, a correlated d-electron KI candidate that also exhibits a low temperature resistivity saturation. On the (010) surface, we find a rich assemblage of metallic states with two-dimensional dispersion. Measurements of the bulk band structure reveal band renormalization, a large temperature-dependent band shift, and flat spectral features along certain high symmetry directions, providing spectroscopic evidence for strong correlations. Our observations suggest that exotic insulating states resembling those in SmB6 and YbB12 may also exist in systems with d instead of f electrons.
Description
| Type of resource | software, multimedia |
|---|---|
| Date created | May 2020 |
Creators/Contributors
| Author | Xu, Ke-Jun |
|---|---|
| Author | Chen, Su-Di |
| Author | He, Yu |
| Author | He, Junfeng |
| Author | Tang, Shujie |
| Author | Jia, Chunjing |
| Author | Ma, Eric Yue |
| Author | Mo, Sung-Kwan |
| Author | Lu, Donghui |
| Author | Hashimoto, Makoto |
| Author | Devereaux, Thomas P. |
| Author | Shen, Zhi-Xun |
Subjects
| Subject | Physics |
|---|---|
| Subject | Applied Physics |
| Subject | Material Science |
| Subject | SLAC |
| Subject | SSRL |
| Genre | Dataset |
Bibliographic information
| Related Publication | Xu, Ke-Jun and Chen, Su-Di and He, Yu and He, Junfeng and Tang, Shujie and Jia, Chunjing and Ma, Eric Yue and Mo, Sung-Kwan and Lu, Dong-Hui and Hashimoto, Makoto and Devereaux, Thomas P. and Shen, Zhi-Xun. (2018). Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2. arXiv. https://arxiv.org/abs/1811.02183v3 |
|---|---|
| Location | https://purl.stanford.edu/bb817cf2658 |
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- Use and reproduction
- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
Preferred citation
- Preferred Citation
- Xu, Ke-Jun and Chen, Su-Di and He, Yu and He, Junfeng and Tang, Shujie and Jia, Chunjing and Ma, Eric Yue and Mo, Sung-Kwan and Lu, Dong-Hui and Hashimoto, Makoto and Devereaux, Thomas P. and Shen, Zhi-Xun. (2020). Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2. Stanford Digital Repository. Available at: https://purl.stanford.edu/bb817cf2658
Collection
Stanford Research Data
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- Contact
- kjxu@stanford.edu
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