Zn-induced Tc Reduction in High- Tc Superconductors: Scattering in the Presence of a Pseudogap
J. L. Tallon, C. Bernhard, G. V. M. Williams, J. W. Loram
DOI 10.1103/PhysRevLett.79.5294 · Physical Review Letters
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Abstract
The depression of Tc with fraction y of Zn substitution is studied across the underdoped and overdoped regions in La-214 and (Y,Ca)-123. The overdoped region is well described by elastic scattering at the unitarity limit with a d-wave strong-coupling superconducting order parameter. The underdoped region shows a marked increase in dTc/dy, consistent with unitary scattering in the presence of an anisotropic normal-state pseudogap which depletes the density of states about EF.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCu1-yZnyO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y0.8Ca0.2Ba2Cu3-3yZn3yO7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85.5 | Pressure not reported | unknown |
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