Evidence for topologically protected surface states and a superconducting phase in [Tl4] (Tl1-x Snx) Te3 using photoemission, specific heat, and magnetization measurements, and density functional theory

K. E. Arpino, D. C. Wallace, Y. F. Nie, T. Birol, P. D.C. King, S. Chatterjee, M. Uchida, S. M. Koohpayeh, J. J. Wen, K. Page, C. J. Fennie, K. M. Shen, T. M. McQueen

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We report the discovery of surface states in the perovskite superconductor [Tl4]TlTe3 (Tl5Te3) and its nonsuperconducting tin-doped derivative [Tl4](Tl0.4Sn0.6)Te3 as observed by angle-resolved photoemission spectroscopy. Density functional theory calculations predict that the surface states are protected by a Z2 topology of the bulk band structure. Specific heat and magnetization measurements show that Tl5Te3 has a superconducting volume fraction in excess of 95%. Thus Tl5Te3 is an ideal material in which to study the interplay of bulk band topology and superconductivity.

Original languageEnglish (US)
Article number017002
JournalPhysical review letters
Volume112
Issue number1
DOIs
StatePublished - Jan 8 2014

Fingerprint

Dive into the research topics of 'Evidence for topologically protected surface states and a superconducting phase in [Tl<sub>4</sub>] (Tl<sub>1-x</sub> Sn<sub>x</sub>) Te<sub>3</sub> using photoemission, specific heat, and magnetization measurements, and density functional theory'. Together they form a unique fingerprint.

Cite this