English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/6100
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Addition energies and density dipole response of quantum rings under the influence of in-plane electric fields

AuthorsMalet, Francesc; Pi, Martí; Barranco, Manuel; Serra, Llorenç ; Lipparini, Enrico
KeywordsCoulomb blockade
Density functional theory
Ground states
Quantum dots
Spin systems
Issue Date3-Dec-2007
PublisherAmerican Physical Society
CitationPhysical Review B 76, 245302 (2007)
AbstractWithin density functional theory, we address the effect of an in-plane electric field [script E] on the ground state and the density dipole response of a many-electron quantum ring, which is also submitted to a perpendicular magnetic field B. Addition energies and density dipole spectra are discussed as a function of [script E]. For the two-electron case, an exact numerical calculation is performed, obtaining the spin-phase diagram in the [script E]-B plane and showing that transitions between singlet and triplet spin states can be induced by varying the fields. We also find that, in spite of the deformation that [script E] causes in the electronic density, the spin of the ground state of a given electron number ring is very robust, changing little as the strength of the electric field is reasonably increased.
Description6 pages.-- PACS numbers: 73.21.-b, 73.22.-f, 71.15.Mb.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevB.76.245302.
Appears in Collections:(IFISC) Artículos
Files in This Item:
File Description SizeFormat 
PhysRevB_76_245302.pdf186,45 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.