Properties of the Bose glass phase in irradiated superconductors near the matching field

Abstract

Structural and transport properties of interacting localized flux lines in the Bose glass phase of irradiated superconductors are studied by means of Monte Carlo simulations near the matching field B_Phi, where the densities of vortices and columnar defects are equal. For a completely random columnar pin distribution in the xy-plane transverse to the magnetic field, our results show that the repulsive vortex interactions destroy the Mott insulator phase which was predicted to occur at B = B_Phi. On the other hand, for ratios of the penetration depth to average defect distance lambda/d <= 1, characteristic remnants of the Mott insulator singularities remain visible in experimentally accessible quantities as the magnetization, the bulk modulus, and the magnetization relaxation, when B is varied near B_Phi. For spatially more regular disorder, e.g., a nearly triangular defect distribution, we find that the Mott insulator phase can survive up to considerably large interaction range λ/d, and may thus be observable in experiments.

RevTex, 17 pages, eps files for 12 figures included

References in corpus (1)

• Commensurate and Incommensurate Vortex States in Superconductors with Periodic Pinning Arrays

Cited by in corpus (12)

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• Effects of columnar disorder on flux-lattice melting in high-temperature superconductors
• Bragg-Bose glass phase in vortex states of high-$T_{\mathrm{c}}$ superconductors with sparse and weak columnar defects
• Suppression of matching field effects by splay and pinning energy dispersion in YBa_2Cu_3O_7 with columnar defects
• Ground state properties of fluxlines in a disordered environment
• Melting and structure of the vortex solid in strongly anisotropic layered superconductors with random columnar pins
• Evidence for an angular dependent contribution from columnar defects to the equilibrium magnetization of YBa_2Cu_3O_{7-d}
• Non-equilibrium Relaxation and Aging Scaling of the Coulomb and Bose Glass
• Higher critical currents yet faster vortex creep in EuBa${}_2$Cu${}_3$O${}_y$ films containing coherent artificial pinning centers
• Monte Carlo Simulation of the Crossover from Bose Glass to Bragg Glass Phase in Layered BSCCO with Columnar Defects