Magnetotransport measurement of effective mass, quantum scattering time, and alloy scattering potential of polarization-doped 3D electron slabs in graded-AlGaN
نویسندگان
چکیده
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 quantum scattering time (tq 1⁄4 0:3 ps) of carriers in the slabs. An analysis of the ratio of quantum and classical scattering times with the scattering mechanisms leads to the first direct measurement of the alloy scattering potential in the AlGaN system (V0 1⁄4 1:8 eV).
منابع مشابه
Magnetotransport properties of a polarization-doped three-dimensional electron slab in graded AlGaN
Shubnikov–de-Haas oscillation is observed in a polarization-doped three-dimensional electron slab in a graded AlxGa1!xN semiconductor layer. The electron slab is generated by the technique of grading the polar semiconductor alloy with spatially changing polarization. Temperature-dependent oscillations allow us to extract an effective mass of m*"0.21m0. The quantum scattering time measured (#q"0...
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