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2007

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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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Recurs relacionat

http://doi.org/10.1103/PhysRevB.76.245302

Resum

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.

Matèries

Estructura electrònica, Semiconductors, Spin (Física nuclear), Electrònica quàntica, Teoria del funcional de densitat

Matèries (anglès)

Electronic structure, Semiconductors, Nuclear spin, Quantum electronics, Density functional theory

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citació

MALET I GIRALT, Francesc, et al. Addition energies and density dipole response of quantum rings under the influence of in-plane electric fields. Physical Review B. 2007. Vol. 76, num. 24, pags. 245302-1-245302-6. ISSN 0163-1829. [consulted: 2 of August of 2026]. Available at: https://hdl.handle.net/2445/10575

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