Lattice dynamics, force constants, and phonon dispersion in model ferroelastics Hg2I2

E.M. Roginskii, A.A. Kvasov, Y.F. Markov, M.B. Smirnov

Research output

3 Citations (Scopus)

Abstract

The dispersion dependences of the frequencies of acoustic and optical phonons have been calculated and plotted, and the density of states of the phonon spectrum of Hg2I2 crystals has been obtained. The influence of hydrostatic pressure on the frequency of acoustic and optical phonons and their dispersion has been theoretically analyzed. The slowest acoustic TA branch (soft mode) at the X point of the Brillouin-zone boundary exhibits strong softening with an increase in pressure. © 2013 Pleiades Publishing, Ltd.
Original languageEnglish
Pages (from-to)413-417
JournalTechnical Physics Letters
Issue number5
DOIs
Publication statusPublished - 2013

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