Frequency distribution function and critical points for phonons in graphite
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A molecular force field for the study of the dynamics of graphite has been reported earlier (Mani and Ramani 1974). In the present paper we present calculations of the single phonon density of states and the lattice specific heat. Most of the peaks in the frequency distribution function have been identified and classified using symmetry-required critical points. The validity of the force field used has also been discussed.
KeywordsPhonons in graphite critical points frequency distribution function specific heat
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