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Abstract
AbstractIt is shown that elementary energy bands concept can be applied to complex systems like solid solutions. As in the case of single crystals, the symmetry of elementary energy bands in the valence band of such systems is related to the actual Wyckoff positions in their unit cells, where accumulation of valence electrons is observed. These results are predicted in the empty‐lattice approximation and confirmed by ab initio calculations of electronic properties of SnS, PbS and Pb0.5Sn0.5S systems. It is suggested that the presented application of the elementary energy bands concept together with the empty‐lattice approximation can be used as a simple method for obtaining charge localization centers in the crystalline lattice and thus for the construction of the well‐localized Wannier functions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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