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 Tc and magnetic fields well above the upper critical field, Hc2(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.
@article{arxiv.1010.4636,
title = {Hall conductivity dominated by fluctuations near the superconducting transition in disordered films},
author = {Nicholas P. Breznay and Karen Michaeli and Konstantin S. Tikhonov and Alexander M. Finkel'stein and Mihir Tendulkar and Aharon Kapitulnik},
journal= {arXiv preprint arXiv:1010.4636},
year = {2015}
}