Coexistence of Local and Band Characters in the Absorption Spectra of Solids. II. Calculations for the Simple Cubic Lattice

摘要: Line shapes of the fundamental absorption and impurity-induced infrared lattice vibrations are calculated in order to clarify complementary interplay local band characters. The shift-broadening matrix method is applied a monatomic simple cubic with nearest neighbor interaction. As one varies short range electron-hole attractive potential electronic case or mass force constant impurity vibrational case, Van Hove singularities undergo metamorphism. A variety appear spectra as result both few remarks made concerning available experimental data.