Superinsulator as a phase of bi-particle localized states

Details Superinsulator as a phase of bi-particle localized states Superinsulator as a phase of bi-particle localized states

2010-11-30

arxiv.org/abs/1011.6642v2

Eur. Phys. J. B 81, 237--244 (2011)

Physics

Condensed Matter

Superconductivity

revtex, 8 pages, discussion and fig added

Scientific paper

10.1140/epjb/e2011-20160-8

We propose a physical picture of superinsulator observed recently in experiments with superconducting films in a magnetic field. On the basis of previous numerical studies we argue that a moderate attraction creates bi-particle localized states at intermediate disorder strength when noninteracting electron states are delocalized and metallic. Our present numerical study show that such localized pairs are broken by a static electric field which strength is above a certain threshold. We argue that such a breaking of localized pairs by a static field is at the origin of superinsulator breaking with a current jump observed experimentally above a certain critical voltage.

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