Quantum interference and the spin orbit interaction in mesoscopic normal-superconducting junctions

Дата и время публикации : 1995-07-11T09:53:29Z

Авторы публикации и институты :
Keith Slevin
Jean-Louis Pichard
P. A. Mello

Ссылка на журнал-издание: J. Phys. I France 6 (1996) 529
Коментарии к cтатье: Revised version, one new figure and revised text. This is the final version which will appear in Journal de Physqiue 1. Latex plus six postscript figures
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We calculate the quantum correction to the classical conductance of a disordered mesoscopic normal-superconducting (NS) junction in which the electron spatial and spin degrees of freedom are coupled by an appreciable spin orbit interaction. We use random matrix theory to describe the scattering in the normal part of the junction and consider both quasi-ballistic and diffusive junctions. The dependence of the junction conductance on the Schottky barrier transparency at the NS interface is also considered. We find that the quantum correction is sensitive to the breaking of spin rotation symmetry even when the junction is in a magnetic field and time reversal symmetry is broken. We demonstrate that this sensitivity is due to quantum interference between scattering processes which involve electrons and holes traversing closed loops in the same direction. We explain why such processes are sensitive to the spin orbit interaction but not to a magnetic field. Finally we consider the effect of the spin orbit interaction on the phenomenon of “reflectionless tunnelling.”

Category: Physics