Impurity effects on the d-wave state of the pair tunneling mechanism for high-Tc superconductors
Yunkyu Bang
DOI 10.1103/PhysRevB.57.142 · Physical Review B
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Abstract
We consider the impurity effects on the d-wave state in Anderson’s interlayer pair tunneling (IPT) mechanism for high-Tc superconductors. We found that the change of density of states and the Tc suppression with impurities are qualitatively the same as the conventional BCS-type d-wave theory despite different gap equations. In particular, for the Tc suppression with the in-plane impurities we solve the Tc equation of the IPT mechanism explicitly including strong inelastic scattering [Σ″∼α(ħw+πkBT)]. As expected, the effect of impurities for the Tc suppression is strongly reduced by inelastic scattering and the results can fit most of the experimental data by varying the impurity scattering strength. The insensitivity of Tc with the out-of-plane rare-earth impurities is shown to be consistent with the IPT mechanism.
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. | 124 | Pressure not reported | unknown |
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