Transport across a normal-superconducting interface: a novel probe of electron-electron interactions in the normal metal

Details Transport across a normal-superconducting interface: a novel probe of electron-electron interactions in the normal metal Transport across a normal-superconducting interface: a novel probe of electron-electron interactions in the normal metal

2000-10-19

arxiv.org/abs/cond-mat/0010290v1

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures, Submitted to Journal of Physics: Condensed Matter

Scientific paper

10.1088/0953-8984/13/6/103

In this letter, we examine the effect of Coulomb interactions in the normal region of a normal-superconducting (N/S) mesoscopic structure, here the change from an attractive to a repulsive coulombic interaction, at the N/S interface, causes a shift in the order parameter phase. We show that this shift has a pronounced effect on Andreev bound states and demonstrate that the effect on Andreev scattering of non-zero order-parameter tails, can be used to probe the sign of the interaction in the normal region.

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