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arXiv · 1010.4636

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

Nicholas P. Breznay·Karen Michaeli·Konstantin S. Tikhonov·Alexander M. Finkel'stein·Mihir Tendulkar·Aharon Kapitulnik
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Abstract

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 $T_c$ and magnetic fields well above the upper critical field, $\text{\text{H}}_{c2}(0)$. 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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Nicholas P. Breznay, Karen Michaeli, Konstantin S. Tikhonov, Alexander M. Finkel'stein, Mihir Tendulkar, Aharon Kapitulnik. 2010-10-22. Hall conductivity dominated by fluctuations near the superconducting transition in disordered films. https://doi.org/10.1103/physrevb.86.014514

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