Observation of topological crystalline insulator surface states on (111)-oriented Pb1−xSnxSe films

Autor:	Tomasz Story, Oscar Tjernberg, Shiva Safaei, Piotr Dziawa, Craig M. Polley, M. H. Berntsen, Anna Reszka, Johan Adell, Ryszard Buczko, Thiagarajan Balasubramanian, B. M. Wojek, B. J. Kowalski, Andrzej Szczerbakow, Perla Kacman, R. Minikayev, Jaroslaw Z. Domagala
Rok vydání:	2014
Předmět:	Brillouin zone Materials science Condensed matter physics Photoemission spectroscopy Topological insulator Binding energy Isotropy Insulator (electricity) Condensed Matter Physics Topology Electronic Optical and Magnetic Materials Solid solution Surface states
Zdroj:	Physical Review B. 89
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.89.075317
Popis:	We present angle-resolved photoemission spectroscopy measurements of the surface states on in-situ grown (111) oriented films of Pb1-xSnxSe, a three-dimensional topological crystalline insulator. We observe surface states with Dirac-like dispersion at (Gamma) over bar and (M) over bar in the surface Brillouin zone, supporting recent theoretical predictions for this family of materials. We study the parallel dispersion isotropy and Dirac-point binding energy of the surface states, and perform tight-binding calculations to support our findings. The relative simplicity of the growth technique is encouraging, and suggests a clear path for future investigations into the role of strain, vicinality, and alternative surface orientations in (Pb,Sn)Se solid solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ee5f23225f9e6bfc8b864a0c060428c https://doi.org/10.1103/physrevb.89.075317 Zobrazit plný text záznamu