Lattice dynamics of first-stage alkali metal graphite intercalation compounds

Chuji Horie, Miyozo Maeda, Yoshio Kuramoto

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48 Citations (Scopus)

Abstract

Phonon dispersion relations for first-stage alkali metal graphite intercalation compounds C8M (M = K, Rb) are calculated by using the Born-von Kármán force constant model. The characteristic effect of intercalation is revealed by comparing the phonon dispersion relation for C8M with that for graphite folded into the Brillouin zone of C8M. Among fifty-four normal modes for C8M, forty-eight modes are associated with vibrations of carbons and exhibit a definite correspondence with the folded dispersion curves for graphite, The remaining six optical modes, which originate from vibrations of alkali metal atoms, yield a significant perturbation to acoustic modes. Experimental results of the Raman scattering for C8M are discussed on the basis of the dispersion relations obtained.

Original languageEnglish
Pages (from-to)430-434
Number of pages5
JournalPhysica B+C
Volume99
Issue number1-4
DOIs
Publication statusPublished - 1980 Jan 1

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