Reentrant superconductivity from the anharmonic electron-phonon interaction
G. D. Mahan
DOI 10.1103/PhysRevB.56.8322 · Physical Review B
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Abstract
The Eliashberg equations are solved for the transition temperature of a superconductor for the case that the phonons are harmonic but the electron-phonon interaction is anharmonic. The anharmonic interaction increases the transition temperature for the same coupling strength. Reentrant behavior is predicted for large anharmonicity.
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