Anharmonic lattice dynamics via the special displacement method

Anharmonic Lattice Dynamics in Na

where X is the vector potential. The results obtheory developed here and in SP with which the experiments give qualitative verification is ent-'rely based on the assumption that in the presence of a magnetic field, the Hamiltonian for the surfacestate levels is given by the replacement tained here indicate that this approximation remains valid when cubic terms are involved in the band structure,

Nonperturbative anharmonic phenomena in crystal lattice dynamics

Slow dynamics of energy transfer between different phonon modes under the resonance conditions is considered. It may result in new effects in the inelastic and quasielastic neutron scattering spectra.

Anharmonic lattice dynamics of solid potassium

An intcrionic potential proposed by Dagcns, Rasolt, and Taylor has been used in classical computcrsimulation experiments on solid K at 162.5 and 311 K. Results for the dynamical structure factor S{gre) are compared with lattice-dynamical calculations employing the self-consistent harmonic approximation plus cubic anharmonic corrections. The lattice&ynamical calculations are in good accord with ...

Lattice dynamics of anharmonic solids from first principles

Anharmonic lattice dynamics of Ag2O studied by inelastic neutron scattering and first-principles molecular dynamics simulations

Tian Lan,1,* Chen W. Li,2 J. L. Niedziela,2 Hillary Smith,1 Douglas L. Abernathy,2 George R. Rossman,3 and Brent Fultz1 1Department of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, USA 2Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA 3Division of Geological and Planetary Sciences, California Institute of Technology, Pasaden...