Vortices and quasiparticles near the ``superconductor-insulator'' transition in thin films.

ORAL

Abstract

We consider the low temperature behavior of an amorphous superconducting film driven normal by a perpendicular magnetic field. We introduce a new two-fluid formulation consisting of fermionized field-induced vortices and electrically neutralized Bogoliubov quasiparticles interacting via a long-ranged statistical interaction. This approach allows us to access a novel non-Fermi liquid phase which naturally interpolates between the low field superconductor and the high field normal metal. We also discuss the transport, thermodynamics, and tunneling properties of the resulting ``vortex metal'' phase.

Authors

  • Victor Galitski

    Physics Department, University of Virginia, University of Virginia

  • Gil Refael

    Caltech

  • Matthew P. A. Fisher

    KITP, UCSB

  • T. Senthil

    IISc