1010.4636 (Nicholas P. Breznay et al.)

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

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

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.

View original: http://arxiv.org/abs/1010.4636