Full-zone k · p parametrization for III-As materials

This paper presents a modeling study of III-As materials´ band structure obtained with a full-zone 54-band k· p model. This model, extending the 30-band model of Refs. [1], [2], accounts for (220) bands and allows a better description of the band structure in the vicinity of the K point [2]. The band gaps and effective masses derived from the band structure are compared with values obtained from other methods, such as the empirical pseudopotential method (EPM) and the tight-binding (TB) approach. Band structures for In_xGa_1-xAs alloys with different In mole fraction x are computed within the virtual crystal approximation.