https://doi.org/10.1140/epjb/e2002-00172-3
Magnetic dipole and electric quadrupole responses of elliptic quantum dots in magnetic fields
1
Dipartimento di Fisica, Università di Trento,
and INFM sezione di Trento, 38050 Povo, Italy
2
Departament de Física, Universitat de les Illes Balears,
07071 Palma de Mallorca, Spain
Corresponding author: a dfslsc4@clust.uib.es
Received:
29
November
2001
Published online:
6
June
2002
The magnetic dipole (M1) and electric quadupole (E2) responses of two-dimensional quantum dots with an elliptic shape are theoretically investigated as a function of the dot deformation and applied static magnetic field. Neglecting the electron-electron interaction we obtain analytical results which indicate the existence of four characteristic modes, with different B-dispersion of their energies and associated strengths. Interaction effects are numerically studied within the time-dependent local-spin-density and Hartree approximations, assessing the validity of the non-interacting picture.
PACS: 73. – Electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
