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Title: Defect motion and lattice pinning barriers in Josephson-junction ladders

Abstract

We study the motion of domain wall defects in a fully frustrated Josephson-junction ladder system, driven by small applied currents. For small system sizes, the energy barrier E{sub B} to the defect motion is computed analytically via symmetry and topological considerations. More generally, we perform numerical simulations directly on the equations of motion, based on the resistively-shunted junction model, to study the dynamics of defects, varying the system size. Coherent motion of domain walls is observed for large system sizes. In the thermodynamical limit, we find E{sub B}=0.1827 in units of the Josephson coupling energy.

Authors:
;  [1];  [2];  [3];  [1];  [4]
  1. Department of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-747 (Korea, Republic of)
  2. Laboratoire de Physique Theorique, Universite Louis Pasteur, 67084 Strasbourg (France)
  3. Department of Physics, Keimyung University, Daegu 704-701 (Korea, Republic of)
  4. (Korea, Republic of)
Publication Date:
OSTI Identifier:
20787821
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevB.73.014504; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; COMPUTERIZED SIMULATION; COUPLING; DEFECTS; DOMAIN STRUCTURE; ELECTRIC CURRENTS; EQUATIONS OF MOTION; JOSEPHSON EFFECT; JOSEPHSON JUNCTIONS; MAGNETIC FLUX; SYMMETRY; TOPOLOGY; WALLS

Citation Formats

Kang, H., Lim, Jong Soo, Fortin, J.-Y., Choi, J., Choi, M. Y., and Korea Institute for Advanced Study, Seoul 130-722. Defect motion and lattice pinning barriers in Josephson-junction ladders. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.0.
Kang, H., Lim, Jong Soo, Fortin, J.-Y., Choi, J., Choi, M. Y., & Korea Institute for Advanced Study, Seoul 130-722. Defect motion and lattice pinning barriers in Josephson-junction ladders. United States. doi:10.1103/PHYSREVB.73.0.
Kang, H., Lim, Jong Soo, Fortin, J.-Y., Choi, J., Choi, M. Y., and Korea Institute for Advanced Study, Seoul 130-722. Sun . "Defect motion and lattice pinning barriers in Josephson-junction ladders". United States. doi:10.1103/PHYSREVB.73.0.
@article{osti_20787821,
title = {Defect motion and lattice pinning barriers in Josephson-junction ladders},
author = {Kang, H. and Lim, Jong Soo and Fortin, J.-Y. and Choi, J. and Choi, M. Y. and Korea Institute for Advanced Study, Seoul 130-722},
abstractNote = {We study the motion of domain wall defects in a fully frustrated Josephson-junction ladder system, driven by small applied currents. For small system sizes, the energy barrier E{sub B} to the defect motion is computed analytically via symmetry and topological considerations. More generally, we perform numerical simulations directly on the equations of motion, based on the resistively-shunted junction model, to study the dynamics of defects, varying the system size. Coherent motion of domain walls is observed for large system sizes. In the thermodynamical limit, we find E{sub B}=0.1827 in units of the Josephson coupling energy.},
doi = {10.1103/PHYSREVB.73.0},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}