Ternary chalcogenide superconductor with rock salt structure

Binary chalcogenide semiconductor, SnTe, becomes superconducting when deficiency of tin or In is doped. Despite the carriers introduced is estimated the same for several dopants, In strongly modulates the electronic structure and superconductivity. We have synthesized superconductor with rock salt structure, Ag1-xS1$+$xSe2 as a reference of the aforementioned material. Several dopants give insight of how superconductivity is modulated by the valence state of tin.