Topological superconductor in quasi-one-dimensional Tl2-xMo6Se6

Abstract

We propose that the quasi-one-dimensional molybdenum selenide compound Tl2-xMo6Se6 is a time-reversal-invariant topological superconductor induced by inter-sublattice 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 E2u 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 tunnelling or phase-sensitive measurements.

arXiv comment6 pages, 3 figures, 1 table

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Cited by in corpus (8)

• Superconductivity at 10.4 K in a novel quasi-one-dimensional ternary molybdenum pnictide K2Mo3As3
• Tuning from Frustrated Magnetism to Superconductivity in Quasi-One-Dimensional KCr${}_3$As${}_3$ Through Hydrogen Doping
• Dimensional crossover in the quasi-one-dimensional superconductor Tl${}_2$Mo${}_6$Se${}_6$
• Lattice dynamics of the cluster chain compounds M2Mo6Se6
• Observation of Dirac-like energy band and unusual spectral line shape in quasi-one-dimensional superconductor Tl2Mo6Se6
• Pressure Engineering of the Dirac Fermions in Quasi-One-Dimensional Tl${}_2$Mo${}_6$Se${}_6$
• Static quark anti-quark interactions at non-zero temperature from lattice QCD
• A magnetic excitation linking quasi-1D Chevrel-type selenide and arsenide superconductors