Search for dissertations about: "electron-phonon interaction"
Showing result 1 - 5 of 17 swedish dissertations containing the words electron-phonon interaction.
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1. Electron-Phonon Interactions in Transition Metal Oxides Studied by Resonance Raman Scattering
Abstract : In this thesis, studies of strong electron-phonon interactions in a number of transition metal oxides are presented. Two different electron-phonon interaction mechanisms are identified; Franck-Condon scattering and infrared active longitudinal optical (IR LO) two-phonon activation. READ MORE
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2. MgB2 hot-electron bolometer mixers for sub-mm wave astronomy
Abstract : Spectroscopy and photometry in the terahertz (THz) range of remote space objects allows for a study of their chemical composition, because this range covers rotational lines from simple molecules and electron transition lines from atoms and ions. Due to high spectral resolution, THz heterodyne receivers al- low for studying dynamical properties of space objects manifested in doppler-shifted emission lines. READ MORE
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3. Theoretical studies of lattice- and spin-polarons
Abstract : Theoretical studies of lattice- and spin-polarons are presented in this thesis, where the primary tool is ab-initio electronic structure calculations. The studies are performed with employment of a variety of analytical and computational methods. READ MORE
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4. Tight-binding calculations of electron scattering rates in semiconducting zigzag carbon nanotubes
Abstract : The technological interest in a material depends very much on its electrical, magnetic, optical and/or mechanical properties. In carbon nanotubes the atoms form a cylindrical structure with a diameter of the order 1 nm, but the nanotubes can be up to several hundred micrometers in length. READ MORE
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5. Theoretical Description of the Electron-Lattice Interaction in Molecular and Magnetic Crystals
Abstract : Electron-lattice interactions are often considered not to play a major role in material's properties as they are assumed to be small, the second-order effects. However, this study shows the importance of taking these effects into account in the simulations. READ MORE