Bulk superconductivity and Pauli paramagnetism in nearly stoichiometric CuCo${}_2$S${}_4$

Yu-Ying Jin, Shi-Huai Sun, Yan-Wei Cui +4

It has long remained elusive whether CuCo${}_2$S${}_4$ thiospinel shows bulk superconductivity. Here we clarify the issue by studying on the samples of sulfur-deficient CuCo${}_2$S…