Superinsulator Phase of Two-Dimensional Superconductors

Details Superinsulator Phase of Two-Dimensional Superconductors Superinsulator Phase of Two-Dimensional Superconductors

1998-09-24

arxiv.org/abs/cond-mat/9809337v1

Physics

Condensed Matter

Superconductivity

8 pages, 3 figures, to appear in Phys. Rev. Lett. (Oktober 1998)

Scientific paper

10.1103/PhysRevLett.81.3523

Using path-integral Quantum Monte Carlo we study the low-temperature phase diagram of a two-dimensional superconductor within a phenomenological model, where vortices have a finite mass and move in a dissipative environment modeled by a Caldeira-Leggett term. The quantum vortex liquid at high magnetic fields exhibits superfluidity and thus corresponds to a {\em superinsulating} phase which is characterized by a nonlinear voltage-current law for an infinite system in the absence of pinning. This superinsulating phase is shifted to higher magnetic fields in the presence of dissipation.

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