Exciton spectra and energy band structure of CuAlSe2 crystals

Abstract

The main exciton parameters and the refined values of the energy intervals V1 (Г7) - C1( Г6), V2 (Г6) - C1( Г6) and V3 (Г7) - C1( Г6) in CuAlSe2 crystals are discussed. The effective masses of electrons (m*с1), and holes (m*V1, m*V2, m*V3) are estimated. The contours of reflectivity spectra at high photon energies (Е>Еg) are calculated on the basis of Kramers-Kronig relations.