Valence subband structure of [100]-, [110]-, and [111]-grown GaAs-(Al,Ga)As quantum wells and the accuracy of the axial approximation

Abstract
Block diagonalization of 4×4 Luttinger Hamiltonians, to be applied for hole-state quantization in [100]-, [110]-, and [111]-grown semiconductor quantum wells, is discussed and the accuracy of the axial approximation is analyzed.