Abstract
High-resolution two-photon magnetoabsorption (TPMA) spectra are obtained for and polarizations in the Voigt geometry. The use of cw C lasers and a sensitive photoconductivity technique have allowed the observation of many new TPMA transitions. A modified Pidgeon-Brown energy-band model, along with the usual spherical two-photon selection rules, explains most of the observed transitions. The temperature dependence of the energy gap is deduced from an analysis of the TPMA spectra at various temperatures.
- Received 22 December 1981
DOI:https://doi.org/10.1103/PhysRevB.25.6300
©1982 American Physical Society