Observation of surface states on heavily indium-doped SnTe(111), a superconducting topological crystalline insulator

C. M. Polley, V. Jovic, T. Y. Su, M. Saghir, D. Newby, B. J. Kowalski, R. Jakiela, A. Barcz, M. Guziewicz, T. Balasubramanian, G. Balakrishnan, J. Laverock, K. E. Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)
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Abstract

The topological crystalline insulator tin telluride is known to host superconductivity when doped with indium (Sn1-xInxTe), and for low indium content (x=0.04) it is known that the topological surface states are preserved. Here we present the growth, characterization, and angle resolved photoemission spectroscopy analysis of samples with much heavier In doping (up to x≈0.4), a regime where the superconducting temperature is increased nearly fourfold. We demonstrate that despite strong p-type doping, Dirac-like surface states persist.

Original languageEnglish
Article number075132
JournalPhysical Review B
Volume93
Issue number7
DOIs
Publication statusPublished - 18 Feb 2016

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