Magnetotransport measurement of effective mass , quantum scattering time , and alloy scattering potential of polarization-doped 3 D electron slabs in graded-AlGaN

By applying the technique of polarization bulk-doping in graded AlGaN, it has been possible to create high-mobility three-dimensional electron slabs. Such 3D electron slabs are observed to exhibit clearly resolved Shubnikov de-Haas oscillations. From a temperature-dependent study of the oscillations, we measure the effective mass (m* 1⁄4 0:21m0) and the… CONTINUE READING