Tc Maximum in Solid Solution of Pyrite IrSe2鈥揜hSe2 Induced by Destabilization of Anion Dimers

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• 作者：Jiangang Guo ; Yanpeng Qi ; Satoru Matsuishi ; Hideo Hosono
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：December 12, 2012
• 年：2012
• 卷：134
• 期：49
• 页码：20001-20004
• 全文大小：317K
• 年卷期：v.134,no.49(December 12, 2012)
• ISSN：1520-5126

文摘

We have established a well-defined dome-shaped T_c curve in Ir_0.94鈥?i>xRh_xSe₂ superconductors. The maximum T_c^onset of 9.6 K was obtained at x = 0.36, at which the Se鈥揝e separation in the dimer anion is the longest. Simultaneously, the destabilization of Se鈥揝e dimers accompanied by partial electron transfer from the Ir/Rh to the chalcogenide ions resulted in the emergence of optimal T_c.