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Título

Optical response of two-dimensional few-electron concentric double quantum rings: A local-spin-density-functional theory study

AutorMalet, Francesc; Pi, Martí; Barranco, Manuel; Lipparini, Enrico; Serra, Llorenç
Palabras claveGallium arsenide
Aluminium compounds
III-V semiconductors
Semiconductor quantum dots
Two-dimensional electron gas
Density functional theory
Localised states
Fecha de publicación16-nov-2006
EditorAmerican Physical Society
CitaciónPhysical Review B 74, 193309 (2006)
ResumenWe have investigated the dipole charge- and spin-density response of few-electron two-dimensional concentric nanorings as a function of the intensity of a perpendicularly applied magnetic field. We show that the dipole response displays signatures associated with the localization of electron states in the inner and outer ring favored by the perpendicularly applied magnetic field. Electron localization produces a more fragmented spectrum due to the appearance of additional edge excitations in the inner and outer ring.
Descripción4 pages.-- PACS numbers: 73.21.-b, 73.22.-f, 71.15.Mb.-- ArXiv pre-print: http://arxiv.org/abs/cond-mat/0610841.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevB.74.193309.
URIhttp://hdl.handle.net/10261/6155
DOI10.1103/PhysRevB.74.193309
ISSN1098-0121
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