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

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

2000-03-17

arxiv.org/abs/cond-mat/0003299v1

Phys. Rev. Lett. vol. 86, pp 5136 - 5139 (2001)

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1103/PhysRevLett.86.5136

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.

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