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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/10575
Addition energies and density dipole response of quantum rings under the influence of in-plane electric fields
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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.
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MALET I GIRALT, Francesc, PI PERICAY, Martí, BARRANCO GÓMEZ, Manuel, SERRA, Llorenç, LIPPARINI, Enrico. Addition energies and density dipole response of quantum rings under the influence of in-plane electric fields. _Physical Review B_. 2007. Vol. 76, núm. 24, pàgs. 245302-1-245302-6. [consulta: 5 de desembre de 2025]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/10575]