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Chemical trends of superconducting properties in pyrochlore oxides

Zenji Hiroi·Jun-Ichi Yamaura·Shigeki Yonezawa·Hisatomo Harima
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Abstract

Chemical trends of fundamental superconducting parameters and normal-state properties are described for a family of pyrochlore oxide superconductors. Particularly, the change of Tc from 1.0 K for alpha-pyrochlore Cd2Re2O7 to 3.3 K (A = Cs), 6.3 K (Rb), and 9.6 K (K) for beta-pyrochlore AOs2O6 is discussed on the basis of the conventional BCS scheme. Enhanced Tc and anomalous features observed for KOs2O6 are ascribed to low-energy phonons probably coming from the rattling of the K cations.

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Zenji Hiroi, Jun-Ichi Yamaura, Shigeki Yonezawa, Hisatomo Harima. 2006-12-29. Chemical trends of superconducting properties in pyrochlore oxides. https://doi.org/10.1016/j.physc.2007.03.023

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