Subharmonic Shapiro steps in Josephson-junction arrays
- 1 July 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (2) , 921-924
- https://doi.org/10.1103/physrevb.44.921
Abstract
Subharmonic Shapiro step structure has been observed in the current-voltage characteristics of 300×300 Nb-Au-Nb superconducting arrays. This subharmonic structure does not appear in the current-voltage characteristics of individual junctions, but appears to reflect a unique dynamical mode of the coupled system. A qualitative model is proposed that attributes the structure to the dynamical response of quantized loops of flux that are created by the antisymmetric self-magnetic field of the array bias current. Application of an external asymmetric magnetic field modifies the structure, which lends strong support to our model.Keywords
This publication has 9 references indexed in Scilit:
- Observation of integer and fractional giant Shapiro steps in arrays of SNS Josephson junctionsPhysica B: Condensed Matter, 1990
- Giant Shapiro steps in Josephson-junction arraysPhysical Review B, 1990
- Dynamical simulations of fractional giant Shapiro steps in two-dimensional Josephson arraysPhysical Review B, 1990
- Calculation of giant fractional Shapiro steps in Josephson-junction arraysPhysical Review Letters, 1990
- Fractional giant Shapiro steps and spatially correlated phase motion in 2D Josephson arraysPhysical Review Letters, 1990
- Theoretical interpretation of resistive transition data from arrays of superconducting weak linksPhysical Review B, 1983
- An alternative analysis of the nonlinear equations of the current-driven Josephson junctionJournal of Low Temperature Physics, 1982
- Effect of ac Impedance on dc Voltage-Current Characteristics of Superconductor Weak-Link JunctionsJournal of Applied Physics, 1968
- Josephson Currents in Superconducting Tunneling: The Effect of Microwaves and Other ObservationsPhysical Review Letters, 1963