FRACTIONAL SHAPIRO STEPS IN LADDER JOSEPHSON ARRAYS

被引:34
作者
YU, WB
HARRIS, EB
HEBBOUL, SE
GARLAND, JC
STROUD, D
机构
[1] Department of Physics, The Ohio State University, Columbus
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 21期
关键词
D O I
10.1103/PhysRevB.45.12624
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We study the response of Josephson ladder arrays (1 x N plaquettes) to a combined ac and dc current. For N greater-than-or-equal-to 1, the arrays are predicted to exhibit Shapiro steps at voltages < V > = nN hBAR-omega/(2e). for n = 1/2, 1, 3/2, ..., over a broad range of fields f = PHI/PHI(0) (PHI = flux per plaquette, PHI(0) = hc/2e). The calculated half-steps persist even in single-plaquette "arrays" at all fields f not-equal 0, and, when the critical currents parallel to the applied current are sufficiently unequal, even at f = 0. Measurements of the step widths DELTA-I1/2(f) and DELTA-I1(f) for 1 x 600 ladder arrays of Nb-Au-Nb junctions are in good agreement with the calculations.
引用
收藏
页码:12624 / 12627
页数:4
相关论文
共 23 条
[1]   FRACTIONAL GIANT SHAPIRO STEPS AND SPATIALLY CORRELATED PHASE MOTION IN 2D JOSEPHSON ARRAYS [J].
BENZ, SP ;
RZCHOWSKI, MS ;
TINKHAM, M ;
LOBB, CJ .
PHYSICAL REVIEW LETTERS, 1990, 64 (06) :693-696
[2]   FRACTIONAL GIANT SHAPIRO STEPS IN 2D JOSEPHSON ARRAYS [J].
BENZ, SP ;
RZCHOWSKI, MS ;
TINKHAM, M ;
LOBB, CJ .
PHYSICA B, 1990, 165 :1645-1646
[3]  
CHOI MY, 1991, PREPRINT
[4]   DYNAMICAL PROPERTIES OF SUPERCONDUCTING ARRAYS [J].
CHUNG, JS ;
LEE, KH ;
STROUD, D .
PHYSICAL REVIEW B, 1989, 40 (10) :6570-6580
[5]   ELECTROMAGNETIC PROPERTIES OF POINT-CONTACT JOSEPHSON-JUNCTION ARRAYS [J].
CLARK, TD .
PHYSICAL REVIEW B, 1973, 8 (01) :137-162
[6]  
DOMINGUEZ D, 1991, PHYS REV LETT, V67, P2367, DOI 10.1103/PhysRevLett.67.2367
[7]   DYNAMIC SIMULATIONS OF FRACTIONAL GIANT SHAPIRO STEPS IN 2-DIMENSIONAL JOSEPHSON ARRAYS [J].
FREE, JU ;
BENZ, SP ;
RZCHOWSKI, MS ;
TINKHAM, M ;
LOBB, CJ ;
OCTAVIO, M .
PHYSICAL REVIEW B, 1990, 41 (10) :7267-7269
[8]   GIANT SHAPIRO STEPS IN JOSEPHSON-JUNCTION ARRAYS [J].
HALSEY, TC .
PHYSICAL REVIEW B, 1990, 41 (16) :11634-11637
[9]   EFFECT OF RANDOM DISORDER ON THE CRITICAL-BEHAVIOR OF JOSEPHSON JUNCTION ARRAYS [J].
HARRIS, DC ;
HERBERT, ST ;
STROUD, D ;
GARLAND, JC .
PHYSICAL REVIEW LETTERS, 1991, 67 (25) :3606-3609
[10]   RADIOFREQUENCY SPECTRAL RESPONSE OF 2-DIMENSIONAL JOSEPHSON-JUNCTION ARRAYS [J].
HEBBOUL, SE ;
GARLAND, JC .
PHYSICAL REVIEW B, 1991, 43 (16) :13703-13706