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Article

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Published version

Publication date

1999

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10478

Spin and density longitudinal response of quantum dots in the time-dependent local-spin-density approximation

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http://dx.doi.org/10.1103/PhysRevB.59.15290

Abstract

The longitudinal dipole response of a quantum dot has been calculated in the far-infrared regime using local-spin-density-functional theory. We have studied the coupling between the collective spin and density modes as a function of the magnetic field. We have found that the spin dipole mode and single-particle excitations have a sizable overlap, and that the magnetoplasmon modes can be excited by the dipole spin operator if the dot is spin polarized. The frequency of the dipole spin edge mode presents an oscillation which is clearly filling factor (v) related. We have found that the spin dipole mode is especially soft for even-n values. Results for selected numbers of electrons and confining potentials are discussed.

Subject

Matèria condensada, Superfícies (Física), Propietats elèctriques

Subject (English)

Condensed matter, Surfaces (Physics), Electric properties

Citation

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

SERRA, Llorenç, et al. Spin and density longitudinal response of quantum dots in the time-dependent local-spin-density approximation. Physical Review B. 1999. Vol. 59, num. 23, pags. 15290-15300. ISSN 0163-1829. [consulted: 9 of June of 2026]. Available at: https://hdl.handle.net/2445/10478

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