Advertisement

Shot Noise and Coherent Multiple Charge Transfer in Superconducting Quantum Point-Contacts

  • J. C. Cuevas
  • A. Martín-Rodero
  • A. L. Yeyati
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 547)

Abstract

We analyze the shot noise in a voltage biased superconducting quantum point-contact. Results are presented for the single channel case with arbitrary transmission. In the limit of very low transmission it is found that the effective charge, defined from the noise-current ratio, exhibits a step-like behavior as a function of voltage with well defined plateaus at integer values of the electronic charge. This multiple charge corresponds to the transmitted charge in a Multiple Andreev Reflection (MAR) process. This effect gradually disappears for increasing transmission due to interference between different MAR processes.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • J. C. Cuevas
    • 1
  • A. Martín-Rodero
    • 1
  • A. L. Yeyati
    • 1
  1. 1.Departamento de Física Teórica de la Materia Condensada C-VUniversidad Autónoma de MadridMadridSpain

Personalised recommendations