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

Summary, in English

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.

• Author: C. M. Polley; V. Jovic; T. Y. Su; M. Saghir; D. Newby; B. J. Kowalski; R. Jakiela; A. Barcz; M. Guziewicz; Balasubramanian Thiagarajan; G. Balakrishnan; J. Laverock; K. E. Smith
• Department/s: MAX IV Laboratory
• Publishing year: 2016-02-18
• Language: English
• Publication/Series: Physical Review B (Condensed Matter and Materials Physics)
• Volume: 93
• Issue: 7
• Links: http://dx.doi.org/10.1103/PhysRevB.93.075132
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Condensed Matter Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1098-0121