We study the possibility of topological superconductivity in the noncentrosymmetric monolayer and trilayer TaS2 with out-of-plane mirror symmetry. A gapless time-reversal invariant f+s-wave pairing state with even mirror parity is found to be a promising candidate. This mixing state holds 12(36) nodes at the Fermi pockets around Γ for monolayer(trilayer) case and its unconventional superconductivity is consistent with the STM 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 mixing states between d+id- and p-ip-wave pairings can be realized in the phase diagram.
@article{arxiv.1904.00408,
title = {Topological Ising pairing states in monolayer and trilayer TaS$_2$},
author = {Weipeng Chen and Jin An},
journal= {arXiv preprint arXiv:1904.00408},
year = {2019}
}