Abstract
The general scattering-matrix formalism is suggested for the description of shot noise in single-channel quantum NS contacts in the presence of smeared Andreev levels in the eV<Δ regime. It is shown that the noise spectral density as a function of frequency shows a number of characteristic features due to the presence of the Andreev resonances in the system. It turns out that, by analyzing these singularities, one can determine the relative phases of the Andreev reflection amplitudes corresponding to the neighboring resonances.
Similar content being viewed by others
References
G. B. Lesovik, Pis’ma Zh. Éksp. Teor. Fiz. 70, 209 (1999) [JETP Lett. 70, 208 (1999)]; S.-R. Eric Yang, Solid State Commun. 81, 375 (1992).
G. B. Lesovik and L. S. Levitov, Phys. Rev. Lett. 72, 538 (1994).
V. A. Khlus, Zh. Éksp. Teor. Fiz. 93, 2179 (1987) [Sov. Phys. JETP 66, 1243 (1987)].
G. B. Lesovik, T. Martin, and J. Torres, Phys. Rev. B 60, 11935 (1999).
J. Torries, T. Martin, and G. B. Lesovik, Phys. Rev. B 63, 134517 (2001).
K. E. Nagaev and M. Büttiker, Phys. Rev. B 63, 081301 (2001).
R. J. Schoelkopf, A. A. Kozhevnikov, D. E. Prober, and M. J. Rooks, Phys. Rev. Lett. 80, 2437 (1998).
A. A. Kozhevnikov, R. J. Schoelkopf, and D. E. Prober, Phys. Rev. Lett. 84, 3398 (2000).
A. Yacobi, M. Helblum, D. Mahalu, and H. Shtrikman, Phys. Rev. Lett. 74, 4047 (1995).
C. Bruder, R. Fazio, and H. Schoeller, Phys. Rev. Lett. 76, 114 (1996); T. Taniguchi and M. Büttiker, Phys. Rev. B 60, 13814 (1999).
A. A. Kozhevnikov, Ph.D. Thesis (Yale, 2001).
M. P. Anantram and S. Datta, Phys. Rev. B 53, 16390 (1996).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko \(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 74, No. 10, 2001, pp. 570–574.
Original Russian Text Copyright © 2001 by Lebedev, Lesovik.