Isotope effect and resistivity in the Hubbard model for d-wave superconductivity
T. Dahm, D. Manske, D. Fay, L. Tewordt
DOI 10.1103/PhysRevB.54.12006 · Physical Review B
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Abstract
For spin-fluctuation-induced d-wave superconductivity in a two-dimensional Hubbard model we calculate the suppression of Tc, the isotope exponent α, and the enhancement of the resistivity ρ due to additional phonon interaction. The smallest Tc suppression and the largest α values are obtained for interactions α2F(q,ω) which are enhanced at q=0. For a reasonably large coupling constant λp the enhancement of ρ yields qualitative agreement with the data on YBa2Cu3O7. However, the largest values of α (∼0.2) lie at the lower limit of the measured values for reduced-Tc materials. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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