title: Bloch oscillations in the presence of plasmons and phonons
abstract: The coupling between Bloch oscillating electrons and longitudinal optical phonons in a superlattice leads to resonant phonon excitation but no gap in the Bloch-phonon spectrum. In addition, we predict a sharp transition from plasma to Bloch oscillations at nu(B) = 2nu(P). From a microscopic description with phenomenological dampings, we numerically map out the behavior of coupled Bloch-plasmon-phonon modes for a wide range of parameters, and mimic experimental conditions. Our results are in good agreement with recent experiments by Dekorsy et al. [Phys. Rev. Lett. 85, 1080 (2000)].
authors.affiliation: Department of Physics, The Ohio State University, 174 West 18th Avenue, Columbus, Ohio 43210, USA.
authors.initials: AW
authors.lastname: Ghosh
authors.initials: L
authors.lastname: Jonsson
authors.initials: JW
authors.lastname: Wilkins