Proximity effect on the superconducting transition temperature of YBa2Cu3O7−x/PrBa2Cu3O7−x superlattices
J. Z. Wu, C. S. Ting, W. K. Chu, X. X. Yao
DOI 10.1103/PhysRevB.44.411 · Physical Review B
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Abstract
The superconducting transition temperature Tc of YBa2Cu3O7−x/PrBa2Cu3O7−x superlattices is studied theoretically with use of the Gor’kov equation. We show that the proximity effect in which the pair amplitude of the superconducting YBa2Cu3O7−x layer leaks to the semiconducting PrBa2Cu3O7−x layer plays a dominant role in explaining the depression of Tc in these superlattices with a minor modification from the charge-carrier-transfer effect across the Y and Pr interface. By adjusting the value of the hopping matrix between the Cu-O plane, our numerical result can be quantitatively compared with recent experimental measurement of Tc in YBa2Cu3O7−x/PrBa2Cu3O7−x superlattices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92.5 | Pressure not reported | unknown |
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