Hall conductivity dominated by fluctuations near the superconducting transition in disordered thin films

We have studied the Hall effect in superconducting tantalum nitride films. We find a large contribution to the Hall conductivity near the superconducting transition, which we can track to temperatures well above T sub(c) and magnetic fields well above the upper critical field H sub(c2) (0). This con...

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Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-07, Vol.86 (1), Article 014514
Hauptverfasser: Breznay, Nicholas P., Michaeli, Karen, Tikhonov, Konstantin S., Finkel'stein, Alexander M., Tendulkar, Mihir, Kapitulnik, Aharon
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container_title Physical review. B, Condensed matter and materials physics
container_volume 86
creator Breznay, Nicholas P.
Michaeli, Karen
Tikhonov, Konstantin S.
Finkel'stein, Alexander M.
Tendulkar, Mihir
Kapitulnik, Aharon
description We have studied the Hall effect in superconducting tantalum nitride films. We find a large contribution to the Hall conductivity near the superconducting transition, which we can track to temperatures well above T sub(c) and magnetic fields well above the upper critical field H sub(c2) (0). This contribution arises from Aslamazov-Larkin superconducting fluctuations, and we find quantitative agreement between our data and recent theoretical analysis based on time-dependent Ginzburg-Landau theory.
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subjects Condensed matter
Fluctuation
Hall effect
Magnetic fields
Superconductivity
Tantalum nitrides
Thin films
title Hall conductivity dominated by fluctuations near the superconducting transition in disordered thin films
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