The Gap-to- Tc Ratio of a van Hove Superconductor

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Abstract

We give an analytical expression for the gap-to-Tc ratio (R) of a superconductor with a van Hove singularity in the density of states. Our calculation yields R in very good agreement with the results obtained numerically by S. Ratanaburi et al. [J. Supercond. 9, 485 (1996)].

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