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arXiv · 1508.03848

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 Jr.·B. Kowalski·R. Jakiela·A. Barcz·M. Guziewicz·T. Balasubramanian·G. Balakrishnan·J. Laverock·K. E. Smith
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Abstract

The topological crystalline insulator tin telluride is known to host superconductivity when doped with indium (Sn$_{1-x}$In$_{x}$Te), and for low indium contents ($x=0.04$) 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 $x\approx0.4$), a regime where the superconducting temperature is increased nearly fourfold. We demonstrate that despite strong p-type doping, Dirac-like surface states persist.

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C. M. Polley, V. Jovic, T. -Y. Su, M. Saghir, D. Newby Jr., B. Kowalski, R. Jakiela, A. Barcz, M. Guziewicz, T. Balasubramanian, G. Balakrishnan, J. Laverock, K. E. Smith. 2015-08-16. Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator. https://doi.org/10.1103/physrevb.93.075132

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