Effect of Spatial Variations of the Superconducting Gap on Suppression of the Transition Temperature by Impurities
M. E. Zhitomirsky, M. B. Walker
DOI 10.1103/PhysRevLett.80.5413 · Physical Review Letters
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Abstract
We calculate correction to the critical temperature of a dirty superconductor, which results from the local variations of the gap function near impurity sites. This correction is of the order of Tc/EF and becomes important for short-coherence length superconductors. It generally reduces a pair-breaking effect. In s-wave superconductors small amounts of nonmagnetic impurities can increase the transition temperature.
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. | — | Pressure not reported | unknown |
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