Topological crystalline insulator states in Pb(1-x)Sn(x)Se.

By P. Dziawa, B. Kowalski, K. Dybko, R. Buczko, A. Szczerbakow, M. Szot, E. Łusakowska, T. Balasubramanian, B. M. Wojek, M. Berntsen and 2 more. Nature Materials, 2012

671 citations recorded by the source corpus.

Topological insulators are a class of quantum materials in which time-reversal symmetry, relativistic effects and an inverted band structure result in the occurrence of electronic metallic states on the surfaces of insulating bulk crystals. These helical states exhibit a Dirac-like energy dispersion across the bulk bandgap, and they are topologically protected. Recent theoretical results have suggested the existence of topological crystalline insulators (TCIs), a class of topological insulators in which crystalline symmetry replaces the role of time-reversal symmetry in ensuring topological protection. In this study we show that the narrow-gap semiconductor Pb(1-x)Sn(x)Se is a TCI for x  =  0.23. Temperature-dependent angle-resolved photoelectron spectroscopy demonstrates that the material undergoes a temperature-driven topological phase transition from a trivial insulator to a TCI. These experimental findings add a new class to the family of topological insulators, and we anticipate that they will lead to a considerable body of further research as well as detailed studies of topological phase transitions.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/e2378ddb7a491f990b6be147ab709de5256c2e1a

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In Atomic and Molecular Physics, and Optics

1. Tanmoy Das
2. Hsin Lin
3. Arun Bansil
4. Zhi-xun Shen
5. J. Sobota
6. Yu He

In Condensed Matter Physics

1. Hsin Lin
2. Zhi-xun Shen
3. Tanmoy Das
4. Arun Bansil

In Materials Chemistry

1. Tanmoy Das
2. Hsin Lin
3. Arun Bansil
4. Zhi-xun Shen
5. Yu He
6. J. Sobota

Citations in the corpus

• Angle-resolved photoemission studies of quantum materials (2020, positive): “46, Pb1−xSnxSe (x = 0.23) undergoes a topological phase transition due to a temperature-dependent inversion of the bulk bands (Dziawa et al., 2012).”