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http://dx.doi.org/10.5012/bkcs.2011.32.2.451

Factors Affecting the Superconducting Transition Temperatures of β-Pyrochlore Oxides AOs2O6 (A=K, Rb and Cs)  

Jung, Dong-Woon (Department of Chemistry and Institute of Basic Natural Sciences, Wonkwang University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.2, 2011 , pp. 451-454 More about this Journal
Abstract
The traditional BCS superconductors $AOs_2O_6$ (A=K, Rb, and Cs) were investigated to find the relationship between their structures and superconducting transition temperatures. The $T_c$ decreases with increasing the unit cell parameter of $AOs_2O_6$. This is in contrast to the case of conventional BCS superconductivity in a single bond model, where $T_c$ may increase with increasing the the unit cell parameter since the DOS at Fermi level increases as the unit cell parameter increases. Instead, the $T_c$ of a $\beta$-pyrochlore oxide is proportional to the lattice softness of the compound.
Keywords
$\beta$-Pyrochlore; Crystal structure; Density of states; Lattice softness; Superconducting transition temperature;
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