Shear and loading in channels: Oscillatory shearing and edge currents of superconducting vortices

J. F. Wambaugh, F. Marchesoni, and Franco Nori
Phys. Rev. B 67, 144515 – Published 25 April 2003
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Abstract

Via computer simulations we study the motion of quantized magnetic flux-lines, or vortices, confined to a straight pin-free channel in a strong-pinning superconducting sample. We find that, when a constant current is applied across this system, a very unusual oscillatory shearing appears, in which the vortices moving at the edges of the channel periodically trail behind and then suddenly leapfrog past the vortices moving in the inner rows. For small enough driving forces, this oscillatory shearing dynamic phase is replaced by a continuous shearing phase in which the distance between initially-nearby vortices grows in time, quickly destroying the order of the lattice. An animation of this novel “oscillatory leapfrogging shear” effect of the vortex edge currents appears in http://www-personal.engin.umich.edu/∼nori/channel/

  • Received 14 May 2002

DOI:https://doi.org/10.1103/PhysRevB.67.144515

©2003 American Physical Society

Authors & Affiliations

J. F. Wambaugh1,2, F. Marchesoni3,4, and Franco Nori1,4,*

  • 1Center for Theoretical Physics, Department of Physics, and Center for the Study of Complex Systems, The University of Michigan, Ann Arbor, Michigan 48109-1120
  • 2Department of Physics, Duke University, Durham, North Carolina 27708
  • 3Istituto Nazionale di Fisica della Materia, Universitá di Camerino, Camerino, I-62032, Italy
  • 4Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan

  • *Corresponding author. Email address: nori@umich.edu

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Vol. 67, Iss. 14 — 1 April 2003

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