Finite-voltage shot noise in normal-metal-superconductor junctions
Abstract
We express the low-frequency shot noise in a disordered normal-metal-superconductor (NS) junction at finite (subgap) voltage in terms of the normal scattering amplitudes and the Andreev reflection amplitude. In the multichannel limit, the conductance exhibits resonances which are accompanied by an enhancement of the (differential) shot noise. In the study of multichannel single and double barrier junctions we discuss the noise properties of coherent transport at low versus high voltage with respect to the Andreev level spacing.
- Publication:
-
Physical Review B
- Pub Date:
- November 1998
- DOI:
- 10.1103/PhysRevB.58.11177
- arXiv:
- arXiv:cond-mat/9711025
- Bibcode:
- 1998PhRvB..5811177F
- Keywords:
-
- 74.80.Fp;
- 72.70.+m;
- 74.50.+r;
- Noise processes and phenomena;
- Tunneling phenomena;
- point contacts weak links Josephson effects;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 6 pages, Latex, 2 eps-figures, to be published in PRB, Appendix on Bogoliubov equations