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.
机构:
Sakarya Univ, Fen Edebiyat Fak, Fizik Bolumu, TR-54187 Adapazari, Turkey
Sakarya Univ, Biyomed Manyetik & Yariiletken Malzemeler Arasti, TR-54187 Adapazari, TurkeySakarya Univ, Fen Edebiyat Fak, Fizik Bolumu, TR-54187 Adapazari, Turkey
Tutuncu, H. M.
Srivastava, G. P.
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Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, EnglandSakarya Univ, Fen Edebiyat Fak, Fizik Bolumu, TR-54187 Adapazari, Turkey