Non-Adiabatic Effects of Superconductor Silane under High Pressure

¹Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031 ²Department of Physics, Hebei University, Baoding 071002

Received Date: January 25, 2010

Published Date: July 31, 2010

Abstract

We present the investigations of non-adiabatic effects by including vertex corrections in the standard Eliashberg theory and show that high phonon frequency is unfavorable to superconductivity in the regime of strong vertex correction. This means that it is hard to find high-transition-temperature superconductors in the compounds with light elements if the non-adiabatic effects are strong. The interplay interaction between non-adiabatic effect and Coulomb interaction makes the transition temperature of silane superconductor not so high as predicted by the standard Eliashberg theory.

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