Issue |
Europhys. Lett.
Volume 33, Number 5, February II 1996
|
|
---|---|---|
Page(s) | 377 - 382 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00350-5 | |
Published online | 01 September 2002 |
Optical-absorption spectra of quantum dots and rings with a repulsive scattering centre
1
Theoretical Physics, University of Oulu - Fin-90570 Oulu, Finland
2
Institute of Mathematical Sciences - Taramani, Madras 600113, India
Received:
19
September
1995
Accepted:
20
December
1995
We have studied electron correlation effects in quantum dots and rings which include a repulsive scattering centre and are subjected to a perpendicular magnetic field. The results for the dipole-allowed absorption spectrum show good qualitative agreement with the observed magnetoplasmon dispersion in similar systems. This work provides a unified description of the electron correlations in quantum dots and quantum rings in a magnetic field. We also demonstrate that optical absorption is a direct route to explore the effects of impurity and interactions in a quantum ring.
PACS: 73.20.Dx – Electron states in low-dimensional structures (including quantum wells, superlattices, layer structures, and intercalation compounds) / 71.45.Gm – Exchange, correlation, dielectric and magnetic functions, plasmons / 73.20.Mf – Collective excitations (including plasmons and other charge-density excitations)
© EDP Sciences, 1996
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