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Related Experiment Videos

Effective temperature in driven vortex lattices with random pinning.

Alejandro B Kolton1, Raphaël Exartier, Leticia F Cugliandolo

  • 1Centro Atómico Bariloche, 8400 San Carlos de Bariloche, Río Negro, Argentina.

Physical Review Letters
|December 18, 2002
PubMed
Summary
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We numerically investigated driven vortex lattices, finding the effective temperature decreases with driving force, matching equilibrium melting during dynamic freezing. This effective temperature can be experimentally measured.

Area of Science:

  • Condensed matter physics
  • Statistical mechanics
  • Non-equilibrium systems

Background:

  • Vortex lattices in driven systems exhibit complex dynamics.
  • Understanding non-equilibrium phenomena is crucial for materials science.
  • Random pinning significantly influences lattice behavior.

Purpose of the Study:

  • To numerically study correlation and response functions in driven vortex lattices with random pinning.
  • To calculate the effective transverse temperature in the fluid moving phase.
  • To investigate the relationship between effective temperature, driving force, and dynamic freezing.

Main Methods:

  • Numerical simulations of driven vortex lattices.
  • Application of a generalized fluctuation-dissipation relation.

Related Experiment Videos

  • Calculation of effective transverse temperature using a generalized Kubo formula.

    • Main Results:

    • The effective transverse temperature decreases as the driving force increases.
    • Effective temperature equals the equilibrium melting temperature at dynamic transverse freezing.
    • A method for experimental measurement of effective temperature is proposed.

    Conclusions:

    • The study provides insights into the thermodynamics of non-equilibrium driven vortex lattices.
    • Dynamic freezing in these systems is linked to a measurable effective temperature.
    • The findings offer a pathway for experimental validation and further research.