Ternary and quaternary chalcogenides of Group IB elements

Methods of synthesis, molecular and electronic structures and electrophysical, optical and magnetic properties of ternary and quaternary chalcogenides based on copper, silver and gold are considered. The possibility of the synthesis of chalcogenide analogues of high-temperature superconductors is discussed. The prospects of searching for new high-temperature superconductors in Ln–Cu–X systems, where Ln is a rare-earth element and X is S, Se or Te, are shown. The bibliography includes 148 references.