Absorption edge of a semiconductor NaX-Se superlattice
Bogomolov V.N. , Poborchii V.V., Kholodkevich S.V.
Anisotropic NaX-Se crystals were obtained by filling with selenium the channels of the isotropic zeolite matrix NaX. Their Raman, reflection, and transmission spectra were measured. It is concluded from the data for the optical properties and geometry of the matrix that the NaX-Se crystals have a superlattice structure. The characteristic features in the region of the absorption edge are interpreted as a manifestation of a miniband structure of the energy spectrum of NaX-Se.