Transport in normal-superconductor-normal structures with local conservation of current

Дата и время публикации : 1997-05-05T10:00:45Z

Авторы публикации и институты :
J. Sánchez-Cañizares (Universidad Autónoma de Madrid)
F. Sols (Universidad Autónoma de Madrid)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 5 PS figures, Latex file, psfig.sty file is added
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con

Краткий обзор статьи: We study the transport properties of a NSN structure with an insulating barrier at each NS interface. Coherent quasiparticle scattering is assumed and self-consistency is implemented exactly to guarantee local charge conservation. The presence of a finite condensate flow has a greater influence on the transport properties than either the gap depression near the interfaces or the coherent nature of scattering. We find that a nonzero phase gradient causes a shift towards lower voltages of the first peak in the differential conductance and a global enhancement of current. At low currents, we obtain gap profiles near the interfaces that are consistent with the criteria for boundary conditions employed in macroscopic descriptions. The existence of coherent multiple scattering gives rise to a rich structure of resonances that is smoothed out for long superconductors.

Category: Physics