Finite size effects in the Bose-glass transition

We present the scaling relations for a Bose-glass superconductor in the case in which the sample is limited in size in the direction of the correlated defects. In this situation, which corresponds to the experiments found in the literature, we show that there are several differences with the predictions based on an infinite sample size analysis, notably, the usual anisotropy in electrical transport, which was shown to be reversed near the Bose-glass transition, is found to be re-established by the finiteness of the sample. In addition, we also derive the general anisotropic scaling relations for a continuous vortex transition in three dimensions which should be applied, for example, in the case of a single family of parallel twin boundaries.