# Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB 6

@article{Zhang2012HybridizationIC, title={Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB 6}, author={Xiaohang Zhang and Nicholas P. Butch and Paul Syers and Steven Ziemak and Richard L. Greene and Johnpierre Paglione}, journal={Physical Review X}, year={2012}, volume={3}, pages={011011} }

As an exemplary Kondo insulator, SmB6 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…

## 128 Citations

### Kondo hybridization and the origin of metallic states at the (001) surface of SmB$_{6}$

- Physics
- 2013

SmB6, a well-known Kondo insulator, has been proposed to be an ideal topological insulator with states of topological character located in a clean, bulk electronic gap, namely the Kondo hybridisation…

### UvA-DARE Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6

- Philosophy
- 2013

SmB 6 , a well-known Kondo insulator, has been proposed to be an ideal topological insulator with states of topological character located in a clean, bulk electronic gap, namely, the…

### Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6.

- PhysicsNature communications
- 2013

The authors' observed in-gap Fermi surface oddness tied with the Kramers' point topology, their coexistence with the two-dimensional transport anomaly in the Kondo hybridization regime, as well as their robustness against thermal recycling, collectively provide strong evidence for protected surface metallicity with a Fermani surface whose topology is consistent with the theoretically predicted topological FermI surface.

### Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB 6

- Physics
- 2013

The Kondo insulator SmB 6 has long been known to exhibit low temperature transport anomalies whose origin is of great interest. Here we uniquely access the surface electronic structure of the…

### Observation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission

- PhysicsNature communications
- 2013

By performing angle-resolved photoemission spectroscopy experiments, several dispersive states within the hybridization gap of SmB6 show negligible kz dependence, which indicates their surface origin, and photoemissions circular dichroism experiments suggest that the in-gap states possess chirality of the orbital angular momentum.

### Direct observation of the spin texture in SmB6 as evidence of the topological Kondo insulator.

- PhysicsNature communications
- 2014

These results provide strong evidence that SmB6 can host topological surface states in a bulk insulating gap stemming from the Kondo effect, which can serve as an ideal platform for investigating of the interplay between novel topological quantum states with emergent effects and competing orders induced by strongly correlated electrons.

### Surface and bulk electronic structure of the strongly correlated system SmB 6 and implications for a topological Kondo insulator

- Physics
- 2013

Recent theoretical calculations and experimental results suggest that the strongly correlated material SmB6 may be a realization of a topological Kondo insulator. We have performed an angle-resolved…

### Additional energy scale in SmB6 at low-temperature

- PhysicsNature communications
- 2016

The authors' high-resolution data provide insight into the electronic structure of SmB6, which reconciles many current discrepancies on this compound, and can be understood in terms of a suppressed Kondo effect at the surface.

### Two-dimensional Fermi surfaces in Kondo insulator SmB6

- PhysicsScience
- 2014

The electronic structure of SmB6 in high magnetic fields is traced and it is found that it does indeed have two-dimensional surface states, and this material is confirmed to be a topological insulator.

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