Abstract
We calculate the attenuation of gapless plasmons in single- and double-layer electron systems by including higher-order corrections to the electron polarization operator from the Coulomb interaction. Both particle-hole excitations and plasmons in the intermediate states contribute to the relaxation. The obtained results are in good agreement with experimental findings for temperatures above 30 K. We also make predictions for plasmon attenuation at low temperatures where no experimental data are currently available.
- Received 10 October 2000
DOI:https://doi.org/10.1103/PhysRevB.62.R16306
©2000 American Physical Society
