On the influence of oxygen anharmonic vibrations on the isotope effect of the high-Tc superconductors
β Scribed by C.P. Enz; Z.M. Galasiewicz
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 265 KB
- Volume
- 166
- Category
- Article
- ISSN
- 0921-4534
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π SIMILAR VOLUMES
The effect of double-well type lattice anharmonicity on the superconducting temperature and its isotope effect is investigated beyond the two-level approximation (TLA) within the Eliashberg theory. It is shown that anharmonicity can greatly modify the isotope effect; In particular anomalously large
The purpose of this paper is to explain the unusual isotope coefficients of cuprates by considering the influence of a pseudogap and phononic and electronic interactions in weak-coupling limit. Exact analytic expressions of the isotope exponent (a) for the s-and d-wave pairing symmetry are derived.