Magnetoconductivity of low-dimensional disordered conductors at the onset of the superconducting transition

Details Magnetoconductivity of low-dimensional disordered conductors at the onset of the superconducting transition Magnetoconductivity of low-dimensional disordered conductors at the onset of the superconducting transition

2009-03-13

arxiv.org/abs/0903.2467v2

Phys. Rev. B 79, 212511 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

Magnetoconductivity of the disordered two- and three-dimensional superconductors is addressed at the onset of superconducting transition. In this regime transport is dominated by the fluctuation effects and we account for the interaction corrections coming from the Cooper channel. In contrast to many previous studies we consider strong magnetic fields and various temperature regimes, which allow to resolve the existing discrepancies with the experiments. Specifically, we find saturation of the fluctuations induced magneto-conductivity for both two- and three-dimensional superconductors at already moderate magnetic fields and discuss possible dimensional crossover at the immediate vicinity of the critical temperature. The surprising observation is that closer to the transition temperature weaker magnetic field provides the saturation. It is remarkable also that interaction correction to magnetoconductivity coming from the Cooper channel, and specifically the so called Maki-Thompson contribution, remains to be important even away from the critical region.

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