Phonon dispersion of indium along [111]

A. S. Bakulin, A. W. Overhauser, H. Kaiser, S. A. Werner, J. A. Fernandez-Baca, H. G. Smith

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The phonon spectrum of indium along [111], measured by inelastic neutron scattering, is reported. The two shear modes at the zone-boundary point (1/2, 1/2, 1/2) are split slightly (on account of a 7.5% tetragonal distortion). They have very low frequencies, ∼0.7 and 1.0 THz, compared to the longitudinal mode, ∼3.4 THz. These measurements verify the theoretical dispersion predicted by the dynamic pseudopotential theory of phonons for free-electron-like metals.

Original languageEnglish
Article number052301
Pages (from-to)523011-523013
Number of pages3
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number5
DOIs
StatePublished - 2001

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