Abstract:The synthesis of Nb 4 S 3 , a previously undiscovered binary sulfide, was achieved using Nb 3 Br 7 S as a precursor. Its structure is composed of Nb 6 S triangular prisms arranged in a polar (Imm2) configuration, with sulfur atoms lying in channels along the a axis. Electrical resistivity measurements and density functional theory calculations were used to determine that Nb 4 S 3 is metallic and therefore a polar metal, with metallic bands occupied by electrons with primarily niobium character. The electrons n… Show more
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