Topological superconductor in quasi-one-dimensional Tl2-xMo6Se6

Huang, Shin-Ming; Hsu, Chuang-Han; Xu, Su-Yang; Lee, Chi-Cheng; Shiau, Shiue-Yuan; Lin, Hsin; Bansil, Arun

doi:10.1103/physrevb.97.014510

Title: Topological superconductor in quasi-one-dimensional Tl 2 - x Mo 6 Se 6

Journal Article · Tue Jan 16 00:00:00 EST 2018 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.97.014510· OSTI ID:1540755

Huang, Shin-Ming ^[1]; Hsu, Chuang-Han ^[2]; Xu, Su-Yang ^[3]; Lee, Chi-Cheng ^[4]; Shiau, Shiue-Yuan ^[2]; Lin, Hsin ^[5]; Bansil, Arun ^[6]

National Sun Yat-sen University, Kaohsiung (Taiwan)
National University of Singapore (Singapore)
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
University of Tokyo (Japan)
National University of Singapore (Singapore); Institute of Physics, Academia Sinica, Nankang Taipei (Taiwan)
Northeastern University, Boston, MA (United States)

Here we propose that the quasi-one-dimensional molybdenum selenide compound Tl_2-xMo₆Se₆ is a time-reversal-invariant topological superconductor induced by intersublattice pairing, even in the absence of spin-orbit coupling (SOC). No noticeable change in superconductivity is observed in Tl-deficient (0 ≤ x ≤ 0.1) compounds. At weak SOC, the superconductor prefers the triplet d vector lying perpendicular to the chain direction and two-dimensional E_2u symmetry, which is driven to a nematic order by spontaneous rotation symmetry breaking. The locking energy of the d vector is estimated to be weak and hence the proof of its direction would rely on tunneling or phase-sensitive measurements.

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Research Organization:: Northeastern Univ., Boston, MA (United States); Temple Univ., Philadelphia, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Ministry of Science and Technology (MoST); Singapore National Research Foundation

Grant/Contract Number:: FG02-07ER46352; SC0012575; AC02-05CH11231; 105- 2112-M-110-014-MY3; NRF-NRFF2013-03

OSTI ID:: 1540755

Alternate ID(s):: OSTI ID: 1417074

Journal Information:: Physical Review. B, Vol. 97, Issue 1; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Title: Topological superconductor in quasi-one-dimensional Tl 2 - x Mo 6 Se 6

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