A liquid heat capacity model using a linear-in-frequency density of states for low-frequency shear modes, plus intramolecular vibrations, outperforms the earlier phonon model on 23 liquids.
The Debye frequency is obtained from the Debye tem- perature of each system, Θ D = ℏωD/kBT
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Revisiting the phonon theory of liquid heat capacity: low-frequency shear modes and intramolecular vibrations
A liquid heat capacity model using a linear-in-frequency density of states for low-frequency shear modes, plus intramolecular vibrations, outperforms the earlier phonon model on 23 liquids.