https://doi.org/10.1140/epjb/e2011-20160-8
Superinsulator as a phase of bi-particle localized states
1
Institut UTINAM, UMR CNRS 6213, Université de Franche-Comté, 25030 Besançon, France
2
Laboratoire de Physique Théorique du CNRS (IRSAMC),
Université de Toulouse, UPS, F-31062 Toulouse, France
Corresponding author: a dima@irsamc.ups-tlse.fr
Received:
4
March
2011
Revised:
27
April
2011
Published online:
25
May
2011
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.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011