Vibration Spectra and Specific Heats of Cubic Metals. I. Theory and Application to Sodium
- 15 January 1955
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 97 (2) , 363-371
- https://doi.org/10.1103/PhysRev.97.363
Abstract
A model for monovalent metals is proposed, on the basis of which the secular equations determining the frequencies of the normal modes of vibration are derived for body-centered and face-centered cubic metals. In contrast to the two force constants occurring in the usual treatments based on the Born-von Kármán model, each of these equations—one for each type of lattice—contains three force constants which may be identified with the three independent elastic constants of a cubic metal. The limitations of the model are discussed.Keywords
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