OFFSETS AND POLARIZATION AT STRAINED AlN/GaN POLAR INTERFACES
نویسنده
چکیده
The strain induced by lattice mismatch at the interface is responsible for the different value of the band discontinuities observed recently for the AlN/GaN (AlN on GaN) and the GaN/AlN (GaN on AlN) polar (0001) interface. We present a first-principles calculation of valence band offsets, interface dipoles, strain-induced piezoelectric fields, relaxed geometric structure, and formation energies. Our results confirm the existence of a large forwardbackward asymmetry for this interface.
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