c-Axis conductivity and intrinsic Josephson effects in YBa2Cu3O7-delta

被引：94

作者：

Rapp, M

Murk, A

Semerad, R

Prusseit, W

机构：

[1] Physik Department E10, Technische Universität München, Garching

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.77.928

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed intrinsic Josephson coupling between CuO2 double layers of YBa2CU3O7-delta by direct detection of ac and de Josephson effects. The crucial points were a reduction of the junction size to the 1-2 mu m range and a weakening of the interlayer coupling via oxygen depletion of the CuO chains. As a result we obtained distinct signatures in the I-V characteristics and 11 GHz microwave emission caused by ac Josephson currents. The temperature dependence of the critical current supports the idea of a superconductor-insulator-superconductor interlayer tunneling mechanism.

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页码：928 / 931

页数：4

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