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Phys Rev Lett. 2005 Aug 12;95(7):077002. Epub 2005 Aug 9.

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

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1
Kavli Institute for Theoretical Physics, University of California, Santa Barbara, 93106-4030, USA.

Abstract

We study the low temperature behavior of an amorphous superconducting film driven normal by a perpendicular magnetic-field (B). For this purpose we introduce a new two-fluid formulation consisting of fermionized field-induced vortices and electrically neutralized Bogoliubov quasiparticles (spinons) 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 B superconductor and the high B normal metal. We discuss the properties of the resulting "vortex metal" phase.

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