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

Bulletin of the Korean chemical society

Dongwoon Jung¹ 

关键词: -Pyrochlore;    Crystal structure;    Density of states;    Lattice softness;    Superconducting transition temperature;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The traditional BCS superconductors AOs2O6 (A=K, Rb, and Cs) were investigated to find the relationship between their structures and superconducting transition temperatures. The Tc decreases with increasing the unit cell parameter of AOs2O6. This is in contrast to the case of conventional BCS superconductivity in a single bond model, where Tc may increase with increasing the the unit cell parameter since the DOS at Fermi level increases as the unit cell parameter increases. Instead, the Tc of a β-pyrochlore oxide is proportional to the lattice softness of the compound.

【 授权许可】

Unknown