Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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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)
  • Received : 2010.10.09
  • Accepted : 2010.11.25
  • Published : 2011.02.20
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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.

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References

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