Pauli spin blockade in weakly coupled quantum dots
| dc.creator | Fransson, J. | |
| dc.creator | Rasander, M. | |
| dc.date | 2005-09-19 | |
| dc.date | 2005-12-01 | |
| dc.date.accessioned | 2026-07-07T06:41:49Z | |
| dc.date.available | 2026-07-07T06:41:49Z | |
| dc.description | In a two-level system, constituted by two serially coupled single level quantum dots, coupled to external leads we find that the current is suppressed in one direction of biasing caused by a fully occupied two-electron triplet state in the interacting region. The efficiency of the current suppression is governed by the ratio between the interdot tunnelling rate and the level off-set. In the opposite bias direction, the occupation of the two-electron triplet is lifted which allows a larger current to flow through the system, where the conductance is provided by transitions between one-electron states and two-electron singlet states. Is is also shown that a finite ferromagnetic interdot exchange interaction provides an extended range of the current suppression, while an anti-ferromagnetic exchange leads to a decreased range of the blockade regime. | |
| dc.description | 9 pages, 2 tables, 6 figures (submitted). The model Hamiltonian has been corrected, which gives the correct triplet and singlet configurations for arbitrary exchange interactions. The correction only affects the case with a finite exchange. Accordingly, Sec. IV D has been replaced with a new discussion that is relevant for the correct model. A few new references have been added | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0509482 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0509482 | |
| dc.identifier | Phys. Rev. B 73, 205333 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.73.205333 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/101807 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Pauli spin blockade in weakly coupled quantum dots | |
| dc.type | text |