New superconducting ternary molybdenum chalcogenides with condensed Mo6n clusters

✍ Scribed by P. Gougeon; M. Potel; M. Sergent; P. Monceau

• Book ID: 103889007
• Publisher: Elsevier Science
• Year: 1985
• Weight: 301 KB
• Volume: 135
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(85)90512-1

✦ Synopsis

The new ternary molybdenum chalcogenides of general formula M2, ' 2Mo6, X6n, 2 (M = Rb, Cs; X = S, Se) crystallize in the trigonal rhombohedral space group R3 (the same as for the Chevrel phases) and are characterized by the new condensed clusters Mo~2, Mo~8 , M024 and M030. Electrical resistivity measurements performed on single crystals indicate that these materials are metallic conductors with an unusual temperature dependence of their resistivity and undergo either a superconducting or a metal-insulator transition at low temperature.