Europhys. Lett.
Volume 47, Number 4, August 1999
Page(s) 494 - 500
Section Condensed matter: electronic structure, electrical, magnetic and optical properties
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00415-5

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 Technology
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 $z = 4.6 \pm 0.3$.


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