Electron transport and intrinsic mobility limits in two-dimensional electron gases of III-V nitride heterostructures

Abstract

Electron transport studies for AlGaN/GaN two-dimensional electron gases is presented. Novel defects in the III-V nitrides are treated theoretically for two-dimensional transport. Theory of electron scattering by charged dislocation lines is presented for realistic two-dimensional electron gases. The theory lets us draw new conclusions about the nature of charges residing in the dislocation in the III-V nitrides. The theory leads to the recognition of the fact that current state of the art highest mobility values are limited intrinsically and not due to removable defects. Ways of bypassing the intrinsic limits to achieve higher mobilities are proposed.