The Isotope Effect within the Anharmonic Model for High-Tc Superconductors
β Scribed by S. L. Drechsler; N. M. Plakida
- Book ID
- 104551930
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 208 KB
- Volume
- 144
- Category
- Article
- ISSN
- 0370-1972
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π SIMILAR VOLUMES
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.
Precision recoil-free fraction valuesL=0.204 (7) andf. =0.365( 12) for Sn atoms in Nb,Sn, have been measured at 297 K and 77 K, respectively. These measurements were compared with previous results obtained by other groups, all of which disagree with one another. The results reported here corroborate