Dynamics of vortex glass phase in strongly type II superconductors

Details Dynamics of vortex glass phase in strongly type II superconductors Dynamics of vortex glass phase in strongly type II superconductors

2008-02-10

arxiv.org/abs/0802.1297v2

Phys. Rev. B78, 104501(2008)

Physics

Condensed Matter

Superconductivity

6 pages, 5 figures

Scientific paper

10.1103/PhysRevB.78.104501

Dynamics of vortices in strongly type-II superconductors with strong disorder is investigated within the frustrated three-dimensional XY model. For two typical models in [Phys. Rev. Lett. {\bf 91}, 077002 (2003)] and [Phys. Rev. B {\bf 68}, 220502(R) (2003)], a strong evidence for the finite temperature vortex glass transition in the unscreened limit is provided by performing large-scale dynamical simulations. The obtained correlation length exponents and the dynamic exponents in both models are different from each other and from those in the three-dimensional gauge glass model. In addition, a genuine continuous depinning transition is observed at zero temperature for both models. A scaling analysis for the thermal rounding of the depinning transition shows a non-Arrhenius type creep motion in the vortex glass phase, contrarily to the recent studies..

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