Coulomb splittings in glasses

23 December 1985

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 55 (26) , 2879-2882
https://doi.org/10.1103/physrevlett.55.2879

Abstract

The equation-of-motion technique has been used to study the optic response functions of a computer-generated periodic random network containing 1536 ions. Long-range Coulomb effects were included for the first time. Our results show unambiguously the existence of an LO-TO splitting. The long-wavelength LO response function peaks at the band edge in the density of states and is very sharp, whereas the log-wavelength TO response function peaks at a lower frequency and is much broader.

Keywords

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