Coulomb splittings in glasses

S. W. De Leeuw, M. F. Thorpe

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2879-2882
Number of pages4
JournalPhysical Review Letters
Issue number26
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • General Physics and Astronomy


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