Topological Ising pairing states in monolayer and trilayer TaS2

Article

关键词: CHARGE-DENSITY-WAVE;    SUPERCONDUCTIVITY;    TRANSITION;    MOS2;   

DOI  :  10.1103/PhysRevB.100.054503

来源: SCIE

【 摘 要 】

We study the possibility of topological superconductivity in the noncentrosymmetric monolayer and trilayer TaS2 with out-of-plane mirror symmetry. A time-reversal-invariant nodal (s + f)-wave pairing state with even mirror parity is found to be a promising candidate. This mixed state holds 12 (36) nodes at the Fermi pockets around Gamma for the monolayer (trilayer) case and its unconventional superconductivity is consistent with the scanning tunneling microscopy experiments observed in 2H-TaS2 thin flakes. Furthermore, with doping or under uniaxial pressure for trilayer 2H-TaS2, large-Chern-number time-reversal symmetry-breaking mixed states between (d + id)- and (p - ip)-wave pairings can be realized in the phase diagram.

【 授权许可】

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