Effect on the superconducting temperature of the momentum dependence of the electron-electron interaction

M. T. Béal-Monod, O. T. Valls

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Abstract

The pairing interaction V(k-k1) is often replaced by a constant V (usually taken to be the average of V(k-k1) over the Fermi surface) in the calculation of the superconducting transition temperature Tc in the standard BCS theory. We examine here the effect of an anisotropic momentum dependence in V(k-k1) on Tc. We present here results for a model separable interaction containing a parameter that controls the anisotropy. We show that for this model Tc is always larger than the corresponding BCS averaged value.

Original languageEnglish (US)
Pages (from-to)2145-2146
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 3
DOIs
StatePublished - Dec 1994

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