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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 2
BKCSDE 32(2)
February 20, 2011 

 
Title
Factors Affecting the Superconducting Transition Temperatures of β-Pyrochlore Oxides AOs2O6 (A=K, Rb and Cs)
Author
Dongwoon Jung
Keywords
β-Pyrochlore, Crystal structure, Density of states, Lattice softness, Superconducting transition temperature
Abstract
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.
Page
451 - 454
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