Langevin vortex dynamics for a layered superconductor in the lowest Landau level approximation

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dc.creatorAl-Saidi, W. A.
dc.creatorStroud, D.
dc.date2003-10-02
dc.date.accessioned2026-07-07T02:53:56Z
dc.date.available2026-07-07T02:53:56Z
dc.descriptionWe have numerically investigated the dynamics of vortices in a clean layered superconductor placed in a perpendicular magnetic field. We describe the energetics using a Ginzburg-Landau free energy functional in the lowest Landau level approximation. The dynamics are determined using the time-dependent Ginzburg-Landau approximation, and thermal fluctuations are incorporated via a Langevin term. The c-axis conductivity at nonzero frequencies, as calculated from the Kubo formalism, shows a strong but not divergent increase as the melting temperature $T_M$ is approached from above, followed by an apparently discontinuous drop at the vortex lattice freezing temperature. The discontinuity is consistent with the occurrence of a first-order freezing. The calculated equilibrium properties agree with previous Monte Carlo studies using the same Hamiltonian. We briefly discuss the possibility of detecting this fluctuation conductivity experimentally.
dc.descriptionTo be published in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0310045
dc.identifierhttp://arxiv.org/abs/cond-mat/0310045
dc.identifierPhys. Rev. B. 68, 144511 (2003).
dc.identifierdoi:10.1103/PhysRevB.68.144511
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22356
dc.subjectSuperconductivity
dc.titleLangevin vortex dynamics for a layered superconductor in the lowest Landau level approximation
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