Correlation Effects on the Coupled Plasmon Modes of a Double Quantum Well
نویسندگان
چکیده
At temperatures comparable to the Fermi temperature, we have measured a plasmon enhanced Coulomb drag in a GaAsyAlGaAs double quantum well electron system. This measurement provides a probe of the many-body corrections to the coupled plasmon modes, and we present a detailed comparison between experiment and theory testing the validity of local field theories. Using a perpendicular magnetic field to raise the magnetoplasmon energy we can induce a crossover to singleparticle Coulomb scattering. [S0031-9007(97)02591-X]
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