Abstract
The effect of hydrostatic pressure on the optical absorption edge of crystalline and amorphous samples of arsenic triselenide As 2Se 3 has been measured at 80°K and 274°K, at high values of optical absorption coefficient (10 3−10 4 cm -1. The contributions of the electron-phonon interaction and of the lattice dilatation to the total temperature shift of the optical absorption edge in amorphous As 2Se 3 have been evaluated.
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