Suppression of the Superconducting Condensate in the High- Tc Cuprates by Zn Substitution and Overdoping: Evidence for an Unconventional Pairing State
C. Bernhard, J. L. Tallon, C. Bucci, R. De Renzi, G. Guidi, G. V. M. Williams, Ch. Niedermayer
DOI 10.1103/PhysRevLett.77.2304 · Physical Review Letters
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Abstract
By muon spin rotation we studied the depression in condensate density, ns by Zn substitution in underdoped, optimal-doped, and overdoped Y0.8Ca0.2Ba2(Cu1−yZny)3O7−δ. The rapid initial decrease of ns is inconsistent with s-wave pairing and magnetic scattering but points towards a d-wave pairing state with nonmagnetic scattering in the unitarity limit irrespective of the doping state. A similar conclusion is inferred from the depression of Tc and ns with overdoping in the pure compounds where pair breaking appears to be associated with increasing three dimensionality.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y0.8Ca0.2Ba2Cu3O6.96 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 46 | Pressure unresolved | onset |
| Y0.8Ca0.2Ba2(Cu1-yZny)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85.5 | Pressure unresolved | onset |
| La1.79Sr0.21Cu1-yZnyO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
| Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
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