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Flux lattice relaxation, noise and symmetry-breaking in frustrated Josephson junction arrays [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
16 pages : digital, PDF file
Additional Creators:
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The purpose of the present report is to study: (1) Relaxation from an initially random flux state. We wish to exhibit the multiple length and time scales involved in this relaxation, and the influence of thermal fluctuations. This noisy relaxation is controlled by the dynamics of various mesoscopic ``defect`` structures defined with respect to the underlying ground-state flux structure. The defects, their mesoscopic collective patterns, and their dynamics control a complex macroscopic response, but are themselves microscopically controlled by the competitions producing the ground-state flux completely. Such multiscaleresponses have been observed in other competing interaction systems e.g., spin glasses, random field magnets, and weakly pinned charge-density waves, as well as noisy responses in high-temperature superconductors. Various ``creep`` and ``stretched-exponential`` regimes have been proposed, as well as phenomenological scaling theories attempting to relate spatial domain sizes with temporal scales. (2) Noisy (i.e.,multitime-scale) voltages responses, and their relation to multilength scales, in current driven JJA`s in the presence of a uniform extended magnetic field which frustrates the flux order.
Report Numbers:
E 1.99:la-ur--93-460
E 1.99: conf-9205310--1
conf-9205310--1
la-ur--93-460
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
03/01/1993.
"la-ur--93-460"
" conf-9205310--1"
"DE93008713"
Field theory and collective phenomena,Perugia (Italy),May 1992.
Bishop, A.R.; Lomdahl, P.S.; Gronbech-Jensen, N.
Funding Information:
W-7405-ENG-36
View MARC record | catkey: 14062920