Title
|
|
|
|
Polarons : recent developments
| |
Author
|
|
|
|
| |
Abstract
|
|
|
|
In this presentation three recent contributions to the theory of continuum (or "Frohlich"-) polarons are discussed. (i) Using a generalization of the Jensen-Feynman variational principle within the path-integral formalism for identical particles, the ground-state energy of a confined N-polaron system is studied as a function of N and of the electron-phonon coupling strength. (ii) Cyclotron-resonance (CR) spectra of a gas of interacting polarons in a GaAs/AlAs quantum well are theoretically investigated taking into account the magnetoplasmon-phonon mixing and the band nonparabolicity. The calculated CR spectra are in a good agreement with experimental data. The theory explains that, for a high-density polaron gas, anticrossing of the CR spectra occurs near the GaAs TO-phonon frequency rather than near the GaAs LO-frequency. (iii) A theoretical investigation of the optical properties of stacked quantum dots is presented, which is based on the non-adiabatic approach. |
| |
Language
|
|
|
|
English
| |
Source (journal)
|
|
|
|
AIP conference proceedings / American Institute of Physics. - New York
| |
Publication
|
|
|
|
New York
:
2003
| |
ISSN
|
|
|
|
0094-243X
| |
Volume/pages
|
|
|
|
695
(2003)
, p. 47-64
| |
ISI
|
|
|
|
000188768400006
| |
|