Darnhofer, T. and Rössler, Ulrich and Broido, D. A. (1996) Hole magnetoplasmons in quantum dots. PHYSICAL REVIEW B, 53 (20). pp. 13631-13640. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
For electrons in quantum dots the dipole absorption spectrum is known to reflect only magnetoplasmon modes with a rigid center-of-mass motion (''generalized Kohn's theorem''). A more complex behavior is expected for holes in quantum dots, as the valence-band mixing prohibits the separation of relative and center-of-mass coordinates, and the dipole field couples then also to the relative motion. We investigate theoretically the far-infrared response of hole-confining quantum dots, assuming a structure that can be realized by the lateral modulation of a two-dimensional hole gas in a GaxAl1-xAs-GaAs quantum well or heterojunction. The ground state of the many-hole system is determined in the local density approximation, using the 4x4 Luttinger Hamiltonian to include the valence-band mixing. The collective response to a dipole field is calculated within the random phase approximation. The resulting far-infrared absorption spectra exhibit a rich set of dipole active magnetoplasmon modes with internal motions of the charge density, which due to the generalized Kohn's theorem are not possible for electrons in quantum dots.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BAND-STRUCTURE; VALENCE BANDS; SEMICONDUCTOR HETEROSTRUCTURES; INVERSION LAYERS; MAGNETIC-FIELD; LANDAU-LEVELS; GAAS; RESONANCES; HELIUM; GAS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Ulrich Rössler |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jul 2023 07:00 |
| Last Modified: | 06 Jul 2023 07:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51710 |
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