Effect of impurity scattering on microwave conductivity of a dx2−y2 superconductor
E. Schachinger, J. P. Carbotte
DOI 10.1103/PhysRevB.57.7970 · Physical Review B
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Abstract
We study the effect of impurity scattering in the Born and unitary limit on the microwave conductivity peak observed in YBa2Cu3O6.95. This peak has been widely interpreted as due to the collapse of the inelastic scattering rate on entering the superconducting state. We assume dx2−y2 symmetry and model the reduction in scattering rate through the application of a cutoff at low energies on the spectral density of the fluctuation spectrum causing the superconductivity. We find that, while the data for Zn doping can be understood with unitary scattering, the Ni data require intermediate strength coupling and are not consistent with Born scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6.95 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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