Phonon-Induced Anomalous Specific Heat of a Nanocrystalline Model Material by Computer Simulation
- 5 June 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 74 (23) , 4686-4689
- https://doi.org/10.1103/physrevlett.74.4686
Abstract
Atomistic simulations of the vibrational density of states of a space-filling nanocrystalline model material show low- and high-frequency tails not seen in the perfect crystal. The interface-related low-frequency phonon modes give rise to a pronounced, grain-size-dependent peak in the low-temperature excess specific heat that is also observed in glasses.Keywords
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