Electron-phonon interaction near Van Hove singularities
- 1 December 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (22) , 16557-16563
- https://doi.org/10.1103/physrevb.48.16557
Abstract
The Eliashberg equations are solved in two dimensions for the transition temperature of a superconductor. The density of states has a logarithmic singularity. We show that the singularity in the density of states has only a small influence on the numerical solutions to the Eliashberg equations, apart from its contributions to the electron-phonon interaction λ. We also consider the effects of the angular dependence of the gap around the Fermi line which occur for s-wave pairing.Keywords
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