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On the Optic Vibrational Modes in Amorphous Arsenic
Author(s) -
Lottici P. P.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221220206
Subject(s) - raman spectroscopy , amorphous solid , arsenic , molecular vibration , molecular physics , neutron , materials science , infrared , spectral line , nuclear magnetic resonance , physics , chemistry , optics , crystallography , quantum mechanics , metallurgy
The Raman, infrared, and inelastic neutron spectra on bulk amorphous arsenic are reviewed and compared. The main peak in the polarized Raman spectra does not correspond to a maximum in the neutron density of states and some kind of vibrational selection rules is observed. This behaviour is interpreted in terms of a simple continuous random network model for the a‐As structure in which symmetric stretch (SS) motions, highly correlated through the network, exhibit high Raman activity.