Abstract
The magnetic field and temperature dependence of the transverse and longitudinal plasmons in have been investigated. A transition between a vortex-glass and a vortex-liquid regime, which revealed different field dependencies of the resonance frequencies, could be clearly observed. The positions and the spectral weights of the plasmons were successfully described using the multilayer model [Phys. Rev. B 64, 024530 (2001)], which takes the compressibility of the electronic liquid into account. The absolute value of the compressibility is close to that of a two-dimensional noninteracting electron gas.
- Received 15 July 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.177003
©2001 American Physical Society