THEORY FOR RESISTIVE TRANSITION IN CUPRATE OXIDES MULTILAYERS

被引：15

作者：

KOYAMA, T

TACHIKI, M

机构：

[1] Institute for Materials Research, Tohoku University, 980, Katahira 2-1-1, Aoba-ku Sendai

来源：

PHYSICA C | 1992年 / 193卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90883-E

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a simple theory to explain the broad resistive transition observed in the cuprate oxides multilayers, PrBCO/YBCO/PrBCO. In this model the proximity-induced superconductivity is assumed in the semiconducting PrBCO films. The transition temperature is reduced as the thickness of the YBCO film decreases. When the YBCO film has a thickness of a few unit cells the superconducting fluctuations are greatly enhanced. We calculate the fluctuation-enhanced conductance of this system, using the "renormalized Gaussian fluctuation approximation". The calculated result for temperature and the YBCO-film-thickness dependence of the resistance is in good agreement with experiments.

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页码：163 / 170

页数：8

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