Abstract
These lectures discuss the information which can be obtained about electronic structure, phonons, and electron-phonon interaction in crystals by means of laser Raman spectroscopy. As prototype materials we choose conventional semiconductors (Ge, Si, GaAs) for which considerable amount of knowledge has accumulated during the past 40 years, and high-T c superconductors which have been in the headlines for the past ten years. The Raman technique yields information about low frequency excitations (bosons), of energies typically below 0.5 eV. These excitations can be either of a vibronic (phonons, localized vibrational modes) or an electronic nature(electronic interband transitions, plasmons, magnons). Examples of excitations of a mixed electronic and vibronic nature will also be discussed.KeywordsPhonon FrequencyElectronic Band StructurePrimitive CellDiamond Anvil CellCoherent PhononThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Published Version
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