Kinetic equation approach to diffusive superconducting hybrid devices

Details Kinetic equation approach to diffusive superconducting hybrid devices Kinetic equation approach to diffusive superconducting hybrid devices

1996-01-18

arxiv.org/abs/cond-mat/9601071v1

Physics

Condensed Matter

11 pages LaTeX including 8 Postscript figures. A copy of the file is also available at http://www.tn.tudelft.nl/tn/thssci.html

Scientific paper

10.1103/PhysRevB.53.14496

We present calculations of the temperature-dependent electrostatic and chemical potential distributions in disordered normal metal-superconductor structures. We show that they differ appreciably in the presence of a superconducting terminal and propose an experiment to measure these two different potential distributions. We also compute the resistance change in these structures due to a recently proposed mechanism which causes a finite effect at zero temperature. The relative resistance change due to this effect is of the order of the interaction parameter in the normal metal. Finally a detailed calculation of the resistance change due to the temperature dependence of Andreev reflection in diffusive systems is presented. We find that the maximal magnitude due to this thermal effect is in general much larger than the magnitude of the novel effect.

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