Two-dimensional multigap superconductivity in bulk 2H−TaSeS

Superconducting transition metal dichalcogenides have emerged as a platform for hosting novel and nontrivial physical phenomena. We report a detailed investigation of superconducting and transport properties on $2H\text{\ensuremath{-}}\mathrm{TaSeS}$ single crystals. It suggests that TaSeS is a multigap anisotropic superconductor with the upper critical field, breaking the Pauli limiting field in both in-plane and out-of-plane directions. The angle dependence of the upper critical field suggests the two-dimensional superconducting nature in bulk $2H\text{\ensuremath{-}}\mathrm{TaSeS}$.