DEGRADATION OF SUPERCONDUCTING TUNNEL JUNCTION CHARACTERISTICS WITH INCREASING BARRIER TRANSPARENCY

被引：33

作者：

KLEINSASSER, AW ^{[1
]}

RAMMO, FM ^{[1
]}

BHUSHAN, M ^{[1
]}

机构：

[1] MIT,LINCOLN LAB,LEXINGTON,MA 02173

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 09期

关键词：

D O I：

10.1063/1.108566

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Measurements are reported of the single-particle characteristics of Nb-Al oxide-Nb superconducting tunnel junctions. Subgap leakage, subharmonic gap structure, and excess current are observed to increase systematically with increasing Josephson critical current density above a few kA/cm2. These phenomena are attributed to multiple Andreev reflections in high transmittance regions of the barrier. Such effects may significantly impact the applications of high critical current density junctions in advanced circuits.

引用

页码：1017 / 1019

页数：3

共 28 条

[1]

ALDERHOF DJ, 1990, PHYSICA B, V165, P1581

[2]

ARNOLD G, UNPUB

[3] SUPERCONDUCTING TUNNELING WITHOUT THE TUNNELING HAMILTONIAN .2. SUBGAP HARMONIC STRUCTURE [J].