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Title
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Polarons : recent developments
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Author
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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AIP conference proceedings / American Institute of Physics. - New York
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Publication
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New York
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2003
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ISSN
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0094-243X
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Volume/pages
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695
(2003)
, p. 47-64
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ISI
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000188768400006
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