Please use this identifier to cite or link to this item:
|Addition energies and density dipole response of quantum rings under the influence of in-plane electric fields
|Malet i Giralt, Francesc
Pi Pericay, Martí
Barranco Gómez, Manuel
Spin (Física nuclear)
Teoria del funcional de densitat
Density functional theory
|The American Physical Society
|Within 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.
|Reproducció digital del document publicat en format paper, proporcionada per http://doi.org/10.1103/PhysRevB.76.245302
|It is part of:
|Physical Review B, 2007, vol. 76, núm. 24, p. 245302-1-245302-6
|Appears in Collections:
|Articles publicats en revistes (Física Quàntica i Astrofísica)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.