Europhys. Lett, 47 (4), pp. 494-500 (1999)
Critical properties of Bose-glass superconductors
J. Lidmar and M. Wallin
Department of Theoretical Physics, Royal Institute of
SE-100 44 Stockholm, Sweden
(received 2 June 1999; accepted 28 June 1999)
PACS. 74.60Ge - Flux pinning, flux creep, and flux-line lattice dynamics.
PACS. 75.40Mg - Numerical simulation studies.
PACS. 05.70Fh - Phase transitions: general studies.
We study vortex lines in high-temperature superconductors with columnar defects produced by heavy-ion irradiation. We reconsider scaling theory for the Bose-glass transition with tilted magnetic fields, and propose, e.g., a new scaling form for the shape of the Bose glass phase boundary, which is relevant for experiments. We also consider Monte Carlo simulations for a vortex model with a screened interaction. Critical exponents are determined from scaling analysis of Monte Carlo data for current-voltage characteristics and other quantities. The dynamic critical exponent is found to be .
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