Nature of the Josephson barrier in electron-beam-written YBa2Cu3O7-delta junctions

被引：7

作者：

Hinaus, BM

Rzchowski, MS

Davidson, BA

Nordman, JE

Siangchaew, K

Libera, M

机构：

[1] UNIV WISCONSIN,DEPT ELECT & COMP ENGN,MADISON,WI 53706

[2] STEVENS INST TECHNOL,DEPT MAT SCI & ENGN,HOBOKEN,NJ 07030

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.56.10828

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze the temperature (T) dependence of the normal-state resistance R-n and critical current I-c in field-emission-gun electron-beam-written YBa2Cu2O7-delta Josephson junctions from the electrode transition temperature (T-c) to 1.5 K. From a theoretical fit to I-c(T) and R-n(T) we find that the Josephson barrier exhibits properties of a small Fermi-surface area, dirty normal metal near its maximum metallic resistivity. Within conventional superconductor-normal-superconductor theory the barrier is 3.5 mean-free-paths long at T-c, with a normal-metal coherence length at T-c intermediate between the clean and dirty limits. [S0163-1829(97)01442-2].

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页码：10828 / 10831

页数：4

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