Abstract
For the first time two experimental methods (DC and time-resolved measurements) were used to study the energy relaxation mechanism in a two-dimensional electron gas. The results are in good agreement with theoretical predictions and yield a constant energy relaxation time of about 500 ps throughout the whole measured electron temperature range (4.2-14 K). From the comparison with theory the authors conclude that the energy loss rate of electrons in AlGaAs/GaAs heterostructures is governed by acoustic phonon scattering via the deformation potential interaction.
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