Spin response of unpolarized quantum dots
Departament de Física, Universitat de les Illes Balears
E-07071 Palma de Mallorca, Spain
2 Departament d'Estructura i Contituents de la Matèria Universitat de Barcelona - E-08028 Barcelona, Spain
Accepted: 24 October 1997
The spin response function for electrons confined in a quantum dot is studied within the time-dependent local spin density approximation (TDLSDA) of density functional theory. In the long-wavelength regime we predict the existence of a low-energy collective dipole () spin mode. The evolution with electron number of the spin response is studied and compared with that of the density response. Predictions for the static dipole polarizability are given.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 78.20.Bh – Theory, models, and numerical simulation
© EDP Sciences, 1997