Andreev transport in two-dimensional normal-superconducting systems in strong magnetic fields

Details Andreev transport in two-dimensional normal-superconducting systems in strong magnetic fields Andreev transport in two-dimensional normal-superconducting systems in strong magnetic fields

2010-04-21

arxiv.org/abs/1004.3648v1

EPL 91 17005 (2010)

Physics

Condensed Matter

Superconductivity

5 pages, 1 figure

Scientific paper

10.1209/0295-5075/91/17005

The conductance in two-dimensional (2D) normal-superconducting (NS) systems is analyzed in the limit of strong magnetic fields when the transport is mediated by the electron-hole states bound to the sample edges and NS interface, i.e., in the Integer Quantum Hall Effect regime.The Andreev-type process of the conversion of the quasiparticle current into the superflow is shown to be strongly affected by the mixing of the edge states localized at the NS and insulating boundaries. The magnetoconductance in 2D NS structures is calculated for both quadratic and Dirac-like normal state spectra. Assuming a random scattering of the edge modes we analyze both the average value and fluctuations of conductance for an arbitrary number of conducting channels.

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