Title
Polarons in semiconductor quantum structures Polarons in semiconductor quantum structures
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
conferenceObject
Publication
Dordrecht :Springer ,
Subject
Mathematics
Physics
Chemistry
Source (journal)
Molecular nanowires and other quantum objects
Source (book)
NATO Advanced Research Workshop on Molecular Nanowires and Other Quantum, Objects, SEP 07-09, 2003, Bled, SLOVENIA
Volume/pages
148(2004) , p. 139-150
ISBN
1-4020-2069-4
ISI
000222494700014
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
In this presentation three recent contributions to the theory of continuum (or "Frohlich"-) polarons are reviewed. (i) Using a generalization of the Jensen-Feymnan 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) A theoretical investigation of the optical properties of stacked quantum dots is presented, which is based on the non-adiabatic approach. (iii) 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 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 in a good agreement with experimental data.
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