Physics – Condensed Matter – Superconductivity
Scientific paper
1999-03-14
Physical Review B 60(2), R742-R745 (1999)
Physics
Condensed Matter
Superconductivity
10 pages, 3 figures
Scientific paper
10.1103/PhysRevB.60.R742
We study the superfluid-insulator transition of a particle-hole symmetric system of long-range interacting bosons in a time-dependent random potential in two dimensions, using the momentum-shell renormalization-group method. We find a new stable fixed point with non-zero values of the parameters representing the short- and long-range interactions and disorder when the interaction is asymptotically logarithmic. This is contrasted to the non-random case with a logarithmic interaction, where the transition is argued to be first-order, and to the $1/r$ Coulomb interaction case, where either a first-order transition or an XY-like transition is possible depending on the parameters. We propose that our model may be relevant in studying the vortex liquid-vortex glass transition of interacting vortex lines in point-disordered type-II superconductors.
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