Abstract
We present valence band-structure calculations for undoped andp-doped cubic AlxGa1-xN/GaN superlattices (SLs), in whichthe coupling between the heavy-hole, light-hole, andspin-orbit-split-hole bands and strain effects due to latticemismatch are taken into account. The calculations are performedwithin a self-consistent approach to the k·ptheory by means of a full six-band Luttinger-Kohn Hamiltonian.Exchange-correlation effects within the two-dimensional hole gasare included in the calculations in the local density approximation.Results for hole minibands and potential profiles are shown asfunctions of the SL period. It is shown that exchange andcorrelation play an important role in the correct description of thesystems.
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