Relaxation of inter-Landau-level excitations in the quantised Hall regime

Abstract

Relaxation of collective plasmon inter-Landau-level excitation is determined by emission of LO-phonons or by Auger-like processes when this emission is suppressed off the magneto-phonon resonance conditions. The decay of “one-cyclotron” magneto-plasmons with wave vectors near the roton minimum is studied under the condition of filling ν=1. Some features of this relaxation should be helpful for the experimental detection of the magnetorotons in a strongly correlated 2D electron gas (2DEG).