Defect-unbinding and the Bose-glass transition in layered superconductors

Abstract

The low-field Bose-glass transition temperature in heavy-ion irradiated Bi_2Sr_2CaCu_2O_8+d increases progressively with increasing density of irradiation-induced columnar defects, but saturates for densities in excess of 1.5 x10^9 cm^-2. The maximum Bose-glass temperature corresponds to that above which diffusion of two-dimensional pancake vortices between different vortex lines becomes possible, and above which the ``line-like'' character of vortices is lost. We develop a description of the Bose-glass line that is in excellent quantitative agreement with the experimental line obtained for widely different values of track density and material parameters.

4 pages, 4 figures, submitted to Phys. Rev. Lett

References in corpus (2)

• Entropy, vortex interactions, and the phase diagram of heavy-ion irradiated Bi_2Sr_2CaCu_2O_8
• Defect-Unbinding Transition in Layered Superconductors

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• Monte Carlo Simulation of the Crossover from Bose Glass to Bragg Glass Phase in Layered BSCCO with Columnar Defects