Critical properties of Bose-glass superconductors

We study vortex lines in high-temperature superconductors with columnar def ects Produced by heavy-ion irradiation. We reconsider scaling theory for th e Bose-glass transition with tilted magnetic fields, and propose, e.g., a n ew scaling form for the shape of the Bose glass phase boundary, which is re levant for experiments. We also consider Monte Carlo simulations for a vort ex model with a screened interaction. Critical exponents are determined fro m scaling analysis of Monte Carlo data for current-voltage characteristics and other quantities. The dynamic critical exponent is found to be z = 4.6 +/- 0.3.