Experimental evidence for topological surface states wrapping around a bulk SnTe crystal

K. Dybko, M. Szot, A. Szczerbakow, M. U. Gutowska, T. Zajarniuk, J. Z. Domagala, A. Szewczyk, T. Story, and W. Zawadzki
Phys. Rev. B 96, 205129 – Published 15 November 2017
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Abstract

We demonstrate that the metallic topological surface states wrap on all sides the three-dimensional topological crystalline insulator SnTe. This is achieved by studying oscillatory quantum magnetotransport and magnetization at tilted magnetic fields, which enables us to observe simultaneous contributions from neighboring sample sides. Taking into account pinning of the Fermi energy by the SnTe reservoir, we successfully describe theoretically the de Haas–van Alphen oscillations of magnetization. The determined π–Berry phase of surface states confirms their Dirac fermion character. We independently observe oscillatory contributions of magnetotransport and magnetization originating from the bulk SnTe reservoir of high hole density. It is concluded that the bulk and surface Landau states exist in parallel. Our main result that the bulk reservoir is surrounded on all sides by the topological surface states has a universal character.

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  • Received 13 July 2017

DOI:https://doi.org/10.1103/PhysRevB.96.205129

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

K. Dybko*, M. Szot, A. Szczerbakow, M. U. Gutowska, T. Zajarniuk, J. Z. Domagala, A. Szewczyk, T. Story, and W. Zawadzki

  • Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland

  • *Krzysztof.Dybko@ifpan.edu.pl

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Issue

Vol. 96, Iss. 20 — 15 November 2017

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