Citation
As. Bakulin et al., Phonon dispersion of indium along [111] - art. no. 052301, PHYS REV B, 6305(5), 2001, pp. 2301
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829
→ ACNP
Volume
6305
Issue
5
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010201)6305:5<2301:PDOIA[>2.0.ZU;2-T
Abstract
The phonon spectrum of indium along [111], measured by inelastic neutron sc
attering, is reported. The two shear modes at the zone-boundary point (1/2,
1/2, 1/2) are split slightly ton account of a 7.5% tetragonal distortion).
They have very low frequencies, similar to0.7 and 1.0 THz, compared to the
longitudinal mode, similar to3.4 THz. These measurements verify the theore
tical dispersion predicted by the dynamic pseudopotential theory of phonons
for free-electron-like metals.