Effect of the Coulomb interaction on the electron relaxation of weakly-confined quantum dot systems

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dc.creatorClimente, Juan I.
dc.creatorBertoni, Andrea
dc.creatorRontani, Massimo
dc.creatorGoldoni, Guido
dc.creatorMolinari, Elisa
dc.date2006-05-10
dc.date.accessioned2026-07-07T08:39:17Z
dc.date.available2026-07-07T08:39:17Z
dc.descriptionWe study acoustic-phonon-induced relaxation of charge excitations in single and tunnel-coupled quantum dots containing few confined interacting electrons. The Full Configuration Interaction approach is used to account for the electron-electron repulsion. Electron-phonon interaction is accounted for through both deformation potential and piezoelectric field mechanisms. We show that electronic correlations generally reduce intradot and interdot transition rates with respect to corresponding single-electron transitions, but this effect is lessened by external magnetic fields. On the other hand, piezoelectric field scattering is found to become the dominant relaxation mechanism as the number of confined electrons increases. Previous proposals to strongly suppress electron-phonon coupling in properly designed single-electron quantum dots are shown to hold also in multi-electron devices. Our results indicate that few-electron orbital degrees of freedom are more stable than single-electron ones.
dc.description20 pages (preprint format), 7 figures, submitted to Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0605259
dc.identifierhttp://arxiv.org/abs/cond-mat/0605259
dc.identifierPhysical Review B 74, 125303 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.125303
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141022
dc.subjectMesoscale and Nanoscale Physics
dc.titleEffect of the Coulomb interaction on the electron relaxation of weakly-confined quantum dot systems
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