248 research outputs found
Electron Scattering in AlGaN/GaN Structures
We present data on mobility lifetime, , quantum lifetime, ,
and cyclotron resonance lifetime, , of a sequence of high-mobility
two-dimensional electron gases in the AlGaN/GaN system, covering a density
range of cm. We observe a large discrepancy
between and (/6) and explain it as
the result of density fluctuations of only a few percent. Therefore, only
--and not -- is a reliable measure of the time between
electron scattering events in these specimens. The ratio
increases with increasing density in this series of samples, but scattering
over this density range remains predominantly in the large-angle scattering
regime
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