Topological superconductor in quasi-one-dimensional Tl2-xMo6Se6

Article

关键词: ORDER-PARAMETER;    TL2MO6SE6;    CUXBI2SE3;    SYMMETRY;    BREAKING;    FERMIONS;    PARITY;    PHASES;    UPT3;   

DOI  :  10.1103/PhysRevB.97.014510

来源: SCIE

【 摘 要 】

We propose that the quasi-one-dimensional molybdenum selenide compound Tl2-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.

【 授权许可】

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