# Topological surface state in the Kondo insulator samarium hexaboride.

@article{Kim2014TopologicalSS, title={Topological surface state in the Kondo insulator samarium hexaboride.}, author={D. J. Kim and Jing Xia and Zachary Fisk}, journal={Nature materials}, year={2014}, volume={13 5}, pages={ 466-70 } }

Topological invariants of electron wavefunctions in condensed matter reveal many intriguing phenomena. A notable example is provided by topological insulators, which are characterized by an insulating bulk coexisting with a metallic boundary state. Although there has been intense interest in Bi-based topological insulators, their behaviour is complicated by the presence of a considerable residual bulk conductivity. Theories predict that the Kondo insulator system SmB6, which is known to undergo…

## 234 Citations

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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.

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The spectroscopic study supports and explains the proposed picture of the incompletely protected surface states in this topological Kondo insulator SmB6, and suggests important implications on generic topological materials whose ground states are governed by strong correlations.

Surface Hall Effect and Nonlocal Transport in SmB6: Evidence for Surface Conduction

- PhysicsScientific reports
- 2013

These results serve as proof that at low temperatures SmB6 has a metallic surface that surrounds an insulating bulk, paving the way for transport studies of the surface state in this proposed TKI material.

Emergent mystery in the Kondo insulator samarium hexaboride

- Physics
- 2020

Samarium hexaboride (SmB 6 ) is an example of a Kondo insulator, in which strong electron correlations cause a band gap to open. SmB 6 hosts both a bulk insulating state and a conductive surface…

Spin- and angle-resolved photoemission on the topological Kondo insulator candidate: SmB6.

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- 2016

This topical review focuses on recent advances in the study of SmB6, the most promising candidate for a topological Kondo insulator, from the perspective of spin- and angle-resolved photoemission spectroscopy with highlights of some important transport results.

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Topological Kondo insulators (TKIs) are new type of symmetry-protected topological insulators, which develop through the interplay of strong correlations and spin-orbit interactions. In these…

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- 2021

We study surface state of a generic topological Kondo insulator (TKI) system, viz. SmB6, by performing a mean-field theoretic (MFT) calculation within the frame-work of periodic Anderson model (PAM)…

Surface Hall Effect and Nonlocal Transport in SmB 6 : Evidence for Surface

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A topological insulator (TI) is an unusual quantum state in which the insulating bulk is topologically distinct from vacuum, resulting in a unique metallic surface that is robust against…

## References

SHOWING 1-10 OF 35 REFERENCES

Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator

- Physics
- 2012

A topological insulator (TI) is an unusual quantum state in which the insulating bulk is topologically distinct from vacuum, resulting in a unique metallic surface that is robust against…

Surface Hall Effect and Nonlocal Transport in SmB6: Evidence for Surface Conduction

- PhysicsScientific reports
- 2013

These results serve as proof that at low temperatures SmB6 has a metallic surface that surrounds an insulating bulk, paving the way for transport studies of the surface state in this proposed TKI material.

Topological Insulator Materials

- Physics
- 2013

Topological insulators represent a new quantum state of matter which is characterized by peculiar edge or surface states that show up due to a topological character of the bulk wave functions. This…

Topological insulators and superconductors

- Physics
- 2011

Topological insulators are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors. They are characterized by a full insulating gap in the…

Colloquium : Topological insulators

- Physics
- 2010

Topological insulators are electronic materials that have a bulk band gap like an ordinary insulator but have protected conducting states on their edge or surface. These states are possible due to…

Low-temperature surface conduction in the Kondo insulator SmB6

- Physics
- 2013

We study the transport properties of the Kondo insulator SmB6 with a specialized configuration designed to distinguish bulk-dominated conduction from surface-dominated conduction. We find that as the…

A topological Dirac insulator in a quantum spin Hall phase

- PhysicsNature
- 2008

The direct observation of massive Dirac particles in the bulk of Bi0.9Sb0.1 is reported, which suggests that the observed surface state on the boundary of the bulk insulator is a realization of the ‘topological metal’, which has potential application in developing next-generation quantum computing devices that may incorporate ‘light-like’ bulk carriers and spin-textured surface currents.

Topological Kondo insulators.

- PhysicsPhysical review letters
- 2010

A topological classification of emergent band structures for Kondo insulators is developed and it is shown that these materials may host three-dimensional topological insulating phases.

Topological crystalline Kondo insulator in mixed valence ytterbium borides.

- PhysicsPhysical review letters
- 2014

YbB12 is revealed to be in a new novel quantum state, strongly correlated topological crystalline Kondo insulator, which is characterized by its nonzero mirror Chern number.

Experimental demonstration of topological surface states protected by time-reversal symmetry.

- PhysicsPhysical review letters
- 2009

By studying the voltage-dependent standing wave patterns, the energy dispersion E(k) is determined, which confirms the Dirac cone structure of the topological states, and shows that, very different from the conventional surface states, backscattering of theTopological states by nonmagnetic impurities is completely suppressed.