Influence of Pair Breaking and Phase Fluctuations on Disordered High Tc Cuprate Superconductors
F. Rullier-Albenque, H. Alloul, R. Tourbot
DOI 10.1103/PhysRevLett.91.047001 · Physical Review Letters
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Abstract
Electron irradiation has been used to introduce point defects in a controlled way in underdoped and optimally doped YBa2Cu3O7−δ crystals. This technique allows us to perform very accurate measurements of Tc and of the ab plane resistivity in a wide range of defect contents xd down to Tc=0. The variation of Tc and of the transition width with xd do not follow current predictions of pair-breaking theories. The data are rather compatible, at least for the highly damaged regime, with the expected influence of phase fluctuations. These results open new questions about the evolution of the defect induced Tc depression over the phase diagram of the cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure unresolved | midpoint |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure unresolved | midpoint |
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