Characteristic features of anharmonic effects in the lattice dynamics of fcc metals

Details Characteristic features of anharmonic effects in the lattice dynamics of fcc metals Characteristic features of anharmonic effects in the lattice dynamics of fcc metals

2000-06-13

arxiv.org/abs/cond-mat/0006205v1

JETP Letters, 69 (1999) 688-693

Physics

Condensed Matter

4 pages, 5 figures, LaTeX

Scientific paper

10.1134/1.568076

The dispersion in the entire Brillouin zone and the temperature dependence (right up to the melting temperature) of the anharmonic frequency shift and phonon damping in a number of fcc metals is investigated on the basis of microscopic calculations. It is found that the anharmonic effects depend sharply on the wave vector in the directions $\Gamma$-X, X-W, and $\Gamma$-L and, in contrast to bcc metals, the magnitude of the effects is not due to the softness of the initial phonon spectrum. It is shown that the relative frequency shifts and the phonon damping near melting do not exceed 10-20%. The relative role of various anharmonic processes is examined, and the relation between the results obtained and existing experimental data is discussed.

Affiliated with

Also associated with

No associations

Rating

Characteristic features of anharmonic effects in the lattice dynamics of fcc metals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Characteristic features of anharmonic effects in the lattice dynamics of fcc metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characteristic features of anharmonic effects in the lattice dynamics of fcc metals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-11894