Nernst effect and superconducting fluctuations in Zn-doped YBa2Cu3O7−δ
Z. A. Xu, J. Q. Shen, S. R. Zhao, Y. J. Zhang, C. K. Ong
DOI 10.1103/PhysRevB.72.144527 · Physical Review B
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Abstract
We report the measurements of in-plane resistivity, Hall effect, and Nernst effect in Zn-doped YBa2Cu3O7−δ epitaxial thin films grown by pulsed laser deposition technique. The pseudogap temperature T*, determined from the temperature dependence of resistivity, does not change significantly with Zn doping. Meanwhile the onset temperature (Tν) of anomalous Nernst signal above Tc0, which is interpreted as evidence for vortex-like excitations, decreases sharply as the superconducting transition temperature Tc0 does. A significant decrease in the maximum of vortex Nernst signal in mixed state is also observed, which is consistent with the scenario that Zn impurities cause a decrease in the superfluid density and therefore suppress the superconductivity. The phase diagram of T*, Tν, and Tc0 versus Zn content is presented and discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2(Cu1-xZnx)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | zero_resistance |
| YBa2(Cu1-xZnx)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | zero_resistance |
| YBa2(Cu1-xZnx)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79 | Pressure not reported | zero_resistance |
| YBa2(Cu1-xZnx)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 67 | Pressure not reported | zero_resistance |
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