Miniband effect on optical vibrations in short-period InxGa1−xAs∕InP superlattices

The formation of the miniband electron energy structure and its effect on optical vibrational modes were explored in doped InxGa1−xAs∕InP superlattices with different periods. The analysis of the high resolution x-ray diffraction, Raman and magnetotransport data allowed us to conclude that in spite of the defect structure of the layers constituting the superlattices, their superperiodicity was well defined. The blueshift of the coupled …