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).
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| http://dx.doi.org/10.1021/ja309724w | DOI Listing |
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