Abstract
The high-frequency response of degenerate hot electrons itinerant two-dimensionally in GaAs and square quantum wells are studied, incorporating the relevant scattering mechanisms and the effects of the nonequilibrium longitudinal optic phonons. The 3 dB cut-off frequency where small-signal AC mobility falls to 0.707 of its low-frequency value is found to be significantly enhanced when the nonequilibrium phonons are included.
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