Influence of a single defect on the conductance of a tunnel point contact between a normal metal and a superconductor

Электpонные свойства металлов и сплавов

Автор(и)

  • Ye.S. Avotina B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • Yu.A. Kolesnichenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • J.M. van Ruitenbeek Kamerlingh Onnes Laboratorium, Universiteit Leiden, Postbus 9504, 2300 Leiden, The Netherlands

DOI:

https://doi.org/10.1063/1.3009591

Ключові слова:

NS point contact, single defect, conductance.

Анотація

We have investigated theoretically the conductance of a normal–superconductor point contact in the tunnel limit and analyzed the quantum interference effects originating from the scattering of quasi-particles by point-like defects. Analytical expressions for the oscillatory dependence of the conductance on the position of the defect are obtained for the defect situated either in the normal metal, or in the superconductor. It is found that the amplitude of oscillations significantly increases when the applied bias approaches the gap energy of the superconductor. The spatial distribution of the order parameter near the surface in the presence of a defect is also obtained.

Завантаження

Дані завантаження ще не доступні.

Downloads

Опубліковано

2008-10-02

Як цитувати

(1)
Avotina, Y.; Kolesnichenko, Y.; Ruitenbeek, J. van. Influence of a Single Defect on the Conductance of a Tunnel Point Contact Between a Normal Metal and a Superconductor: Электpонные свойства металлов и сплавов. Fiz. Nizk. Temp. 2008, 34, 1184-1191.

Номер

Розділ

Статті

Статті цього автора (авторів), які найбільше читають

<< < 1 2 3