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(Color online) The MIS-HEMT structures and the electrostatic charts for the (a) Ga-polar and (b) N-polar cases.
(Color online) Remote-ionized impurity scattering-limited (acoustic + optical), phonon limited, and total mobility as a function of the 2DEG density.
(Color online) 2DEG mobility as a function of the 2DEG density for various AlGaN cap thickness.
(Color online) The schematic of mobility versus dielectric/AlGaN interface charges density (nfix) for various 2DEG densities. As the 2DEG density is reduced, the mobility drop is more substantial due to lack of screening.
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