Spectroscopic evidence for bonding coordination defects in amorphous as
Contributors: Robert J. Nemanich, G. Lucovsky, W. Pollard, J.D. Joannopoulos
ABSTRACT
Spectroscopic evidence for four-fold and possibly, two-fold coordinated defects in amorphous As is presented. Structure in Raman scattering and infrared absorption measurements is interpreted using force-constant models and the cluster-Bethe-lattice method. The positions and intensities of certain peaks suggest that these defects may be the analogues of valence alternation pairs in amorphous chalcogenide glasses.