title: T(c) maximum in solid solution of pyrite IrSe2-RhSe2 induced by destabilization of anion dimers.
abstract: We have established a well-defined dome-shaped T(c) curve in Ir(0.94-x)Rh(x)Se(2) superconductors. The maximum T(c)(onset) of 9.6 K was obtained at x = 0.36, at which the Se-Se separation in the dimer anion is the longest. Simultaneously, the destabilization of Se-Se dimers accompanied by partial electron transfer from the Ir/Rh to the chalcogenide ions resulted in the emergence of optimal T(c).
authors.affiliation: Frontier Research Center, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
authors.forename: Jiangang
authors.initials: J
authors.lastname: Guo
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Qi
authors.forename: Satoru
authors.initials: S
authors.lastname: Matsuishi
authors.forename: Hideo
authors.initials: H
authors.lastname: Hosono