FRACTIONAL GIANT SHAPIRO STEPS AND SPATIALLY CORRELATED PHASE MOTION IN 2D JOSEPHSON ARRAYS

被引：198

作者：

BENZ, SP ^{[1
]}

RZCHOWSKI, MS ^{[1
]}

TINKHAM, M ^{[1
]}

LOBB, CJ ^{[1
]}

机构：

[1] HARVARD UNIV, DIV APPL SCI, CAMBRIDGE, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.64.693

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have applied radio-frequency signals to 1000 by 1000 arrays of Josephson junctions and observed giant Shapiro steps at voltages 1000 times that expected for a single junction. When a perpendicular magnetic field is applied, fractional giant steps appear at voltages directly related to the number of flux quanta per unit cell. A phenomenological model is proposed that utilizes the spatial arrangement of the vortices in a superlattice relative to the underlying array to explain these novel steps. © 1990 The American Physical Society.

引用

页码：693 / 696

页数：4

共 23 条

[1] SUPERCONDUCTIVITY OF NETWORKS - A PERCOLATION APPROACH TO THE EFFECTS OF DISORDER [J].