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Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries

Author

Listed:
  • Harshwardhan Chaturvedi

    (Department of Physics and Center for Soft Matter and Biological Physics (MC 0435))

  • Nathan Galliher

    (Department of Physics and Center for Soft Matter and Biological Physics (MC 0435)
    University of North Carolina)

  • Ulrich Dobramysl

    (Wellcome Trust/CRUK Gurdon Institute, University of Cambridge)

  • Michel Pleimling

    (Department of Physics and Center for Soft Matter and Biological Physics (MC 0435)
    Academy of Integrated Science (MC 0405))

  • Uwe C. Täuber

    (Department of Physics and Center for Soft Matter and Biological Physics (MC 0435))

Abstract

We explore the dynamics of driven magnetic flux lines in disordered type-II superconductors in the presence of twin boundaries oriented parallel to the direction of the applied magnetic field, using a three-dimensional elastic line model simulated with Langevin molecular dynamics. The lines are driven perpendicular to the planes to model the effect of an electric current applied parallel to the planes and perpendicular to the magnetic field. A study of the long-time non-equilibrium steady states for varying sample orientation and thickness reveals a rich collection of dynamical regimes spanning the depinning crossover region that separates the pinned and moving-lattice states of vortex matter. We observe the emergence of a preferred direction for the ordering of the Abrikosov lattice in the free-flowing vortex regime due to asymmetric pinning by the planar defects. We have performed novel direct measurements of flux line excitations such as half-loops and double kinks to aid the characterization of the topologically rich flux flow profile.

Suggested Citation

  • Harshwardhan Chaturvedi & Nathan Galliher & Ulrich Dobramysl & Michel Pleimling & Uwe C. Täuber, 2018. "Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 91(11), pages 1-13, November.
    • Handle: RePEc:spr:eurphb:v:91:y:2018:i:11:d:10.1140_epjb_e2018-90447-3
    DOI: 10.1140/epjb/e2018-90447-3
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    Statistical and Nonlinear Physics;

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