Fermiology of the strongly spin-orbit coupled superconductor Sn 1-xInxTe: Implications for topological superconductivity

T. Sato, Y. Tanaka, K. Nakayama, S. Souma, T. Takahashi, S. Sasaki, Z. Ren, A. A. Taskin, Kouji Segawa, Yoichi Ando

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67 Citations (Scopus)


We have performed angle-resolved photoemission spectroscopy on the strongly spin-orbit coupled low-carrier density superconductor Sn1-xIn xTe (x=0.045) to elucidate the electronic states relevant to the possible occurrence of topological superconductivity, as recently reported for this compound based on point-contact spectroscopy. The obtained energy-band structure reveals a small holelike Fermi surface centered at the L point of the bulk Brillouin zone, together with a signature of a topological surface state, indicating that this material is a doped topological crystalline insulator characterized by band inversion and mirror symmetry. A comparison of the electronic states with a band-noninverted superconductor possessing a similar Fermi surface structure, Pb1-xTlxTe, suggests that the anomalous behavior in the superconducting state of Sn1-xIn xTe is related to the peculiar orbital characteristics of the bulk valence band and/or the presence of a topological surface state.

Original languageEnglish
Article number206804
JournalPhysical review letters
Issue number20
Publication statusPublished - 2013 May 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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