TEMPERATURE-DEPENDENT LANDAU DAMPING OF THE ACOUSTIC PLASMON IN A BILAYER SYSTEM

We report temperature effects in the Landau damping of the acoustic pl asmon mode in a double-quantum-well system. Its dispersion has been me asured using Raman spectroscopy and modeled within the random-phase ap proximation (RPA). The Landau damping of the acoustic plasmon has also been modeled within the RPA using a O-K Hubbard correction, with mixe d success. This points to the need for further theoretical work on loc al-field corrections at higher temperatures, but shows the value of th e study of the temperature dependence of Landau damping as a probe of many-body effects.