Thouless energy of a superconductor from non local conductance fluctuations
| dc.creator | Duhot, S. | |
| dc.creator | Mélin, R. | |
| dc.date | 2006-04-13 | |
| dc.date | 2006-07-20 | |
| dc.date.accessioned | 2026-07-07T07:05:29Z | |
| dc.date.available | 2026-07-07T07:05:29Z | |
| dc.description | We show that a spin-up electron from a normal metal entering a superconductor propagates as a composite object consisting of a spin-down hole and a pair in the condensate. This leads to a factorization of the non local conductance as two local Andreev reflections at both interfaces and one propagation in the superconductor, which is tested numerically within a one dimensional toy model of reflectionless tunneling. Small area junctions are characterized by non local conductance fluctuations. A treatment ignoring weak localization leads to a Thouless energy inverse proportional to the sample size, as observed in the numerical simulations. We show that weak localization can have a strong effect, and leads to a coupling between evanescent quasiparticles and the condensate by Andreev reflections ``internal'' to the superconductor. | |
| dc.description | 11 pages, 12 figures, revised manuscript | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0604341 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0604341 | |
| dc.identifier | Eur. Phys. J. B 53, 257 (2006) | |
| dc.identifier | doi:10.1140/epjb/e2006-00372-9 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/109687 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Superconductivity | |
| dc.title | Thouless energy of a superconductor from non local conductance fluctuations | |
| dc.type | text |