Quantum critical phenomena of long-range interacting bosons in a time-dependent random potential

Article

关键词: SUPERCONDUCTOR-INSULATOR TRANSITION;    MAGNETIC-FIELD;    SUPERFLUID TRANSITION;    2-DIMENSIONAL FILMS;    PHASE-TRANSITIONS;    GLASS;   

DOI  :  10.1103/PhysRevB.60.R742

来源: SCIE

【 摘 要 】

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 stable fixed point with nonzero values of the parameters representing the short- and long-range interactions and disorder when the interaction is asymptotically logarithmic. This is contrasted to the nonrandom 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.

【 授权许可】

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