Dispersive Anharmonic Effects in the Lattice Dynamics of Quantum Crystals with Hard-Core Potentials
- 12 August 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 21 (7) , 435-437
- https://doi.org/10.1103/physrevlett.21.435
Abstract
A simple approach to lattice dynamics provides a treatment of noninstantaneous (dispersive) anharmonicities in highly anharmonic crystals with singular (hard-core) interparticle potentials. The theory may be used to study the balance between single-particle and collective motions (phonons) in solid helium.Keywords
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