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Ordering dynamics in type-II superconductors.

Nicholas Guttenberg1, Nigel Goldenfeld

  • 1Department of Physics, University of Illinois at Urbana-Champaign, Loomis Laboratory, 1110 West Green Street, Urbana, Illinois 61801-3080, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 7, 2007
PubMed
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Vortex dynamics in type-II superconductors were analyzed. Applied magnetic fields confine vortices, leading to scaling behavior consistent with numerical data.

Area of Science:

  • Condensed Matter Physics
  • Superconductivity Dynamics

Background:

  • Type-II superconductors exhibit vortex behavior crucial for understanding their electromagnetic properties.
  • Vortex dynamics are complex, particularly after a quench and under applied magnetic fields.

Purpose of the Study:

  • To analyze the dynamics of vortices in type-II superconductors after a quench.
  • To investigate the influence of an external magnetic field on vortex spacing and scaling laws.

Main Methods:

  • Employed analytic and numerical methods for dynamic analysis.
  • Investigated vortex spacing and scaling exponents in three-dimensional and thin-sheet superconductors.

Main Results:

  • In 3D, vortex spacing scales with time t with exponent phi=0.414±0.01 (no field).

Related Experiment Videos

  • In thin sheets, scaling exponent phi=0.294±0.01.
  • Applied magnetic fields lead to vortex confinement and crossover between power-law and lattice length scales.

    • Conclusions:

    • The observed scaling behavior is consistent with a one-parameter scaling of vortex spacing with magnetic field and time.
    • Findings provide insights into vortex confinement and dynamics in superconductors under magnetic fields.