THE PSEUDOHARMONIC THEORY OF LATTICE VIBRATIONS,
Abstract
A self-consistent harmonic hamiltonian is derived to describe lattice vibrations in an anharmonic crystal. The force constants are shown to be both self-consistent averages of derivatives of the instantaneous potential energy and derivatives of the free energy with respect to the mean atomic positions at all temperatures. Questions of thermodynamic stability and structural phase transitions are thus embraced by the present theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0640944
Entities
People
- Morrel H. Cohen
- Richard M Martin
Organizations
- University of Chicago