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Title
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Polarons in semiconductor quantum structures
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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 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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Language
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English
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Source (journal)
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NATO science series: series II : mathematics, physics and chemistry. - London
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Source (book)
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NATO Advanced Research Workshop on Molecular Nanowires and Other Quantum, Objects, SEP 07-09, 2003, Bled, SLOVENIA
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Publication
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Dordrecht
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Springer
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2004
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ISBN
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1-4020-2069-4
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Volume/pages
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148
(2004)
, p. 139-150
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ISI
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000222494700014
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