J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-670 - C6-672|
J. Phys. Colloques 42 (1981) C6-670-C6-672
PHONON ASSISTED TRANSITIONS IN THE FREE CARRIER ABSORPTION OF SEMICONDUCTORS IN QUANTIZING MAGNETIC FIELDSH.N. Spector1, 2 et T.M. Rynee3
2 This research was supported in part by a grant from the NSF Materials Research Laboratory Program, Grant No. DMR 76-24466.
We have investigated the effect of the scattering of free carriers in semiconductors by both acoustic and optical phonons on the free carrier absorption in quantizing magnetic fields. We find that for electromagnetic radiation polarized either parallel or perpendicular to the magnetic field, the free carrier absorption is an oscillatory function of the magnetic field. The origin of this oscillatory magneto-absorption is due to phonon assisted transitions between the various Landau levels of the free carriers in quantizing magnetic fields. From the periods of the oscillations in the free carrier absorption, the frequencies of those phonons which interact most strongly with the free carriers can be found.