Plasmon-Phonon Coupling in One-Dimensional Semiconductor Quantum-Wire Structures

摘要

Collective excitation modes of coupled one dimensional electron longitudinaloptical phonon systems (as occurring, for example, in GaAs quantum wires) are calculated in the mean field approximation. In sharp contrast to higher dimensional systems, the plasmon phonon coupling is found to be strong at all densities. We also calculate the inelastic scattering rate of energetic quantum wire electrons in the random phase approximation, finding sharp thresholds in the scattering rate corresponding to the emission of coupled plasmon phonon modes.