Magneto-Polarons in a Two-Dimensional Electron Inversion Layer on InSb

In electron inversion layers on InSb the cylotron resonance energies and linewidths are found to exhibit a marked discontinuity in the vicinity of the bulk longitudinal-optical-phonon energy. These features are attributed to resonant electron-phonon interaction in the two-dimensional electron system. The experimentally observed mass discontinuity indicates that the electron-optical-phonon interaction in a two-dimensionally confined electron system is enhanced in comparison to the three-dimensional case.