Результаты исследований: Научные публикации в периодических изданиях › статья в журнале по материалам конференции › Рецензирование
Phonon dispersion and pressure behavior of Hg2Cl2 crystals. / Kvasov, A. A.; Markov, Yu F.; Roginskii, E. M.; Smirnov, M. B.
в: Ferroelectrics, Том 397, № 1, 2010, стр. 81-89.Результаты исследований: Научные публикации в периодических изданиях › статья в журнале по материалам конференции › Рецензирование
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TY - JOUR
T1 - Phonon dispersion and pressure behavior of Hg2Cl2 crystals
AU - Kvasov, A. A.
AU - Markov, Yu F.
AU - Roginskii, E. M.
AU - Smirnov, M. B.
N1 - Funding Information: This study was supported by the Russian Foundation for Basic Research (project no. 09-08-00739), the Presidium of the Russian Academy of Sciences (Program P-03), the grant for young scientists, young PhD of universities and academic institutes of Saint-Petersburg. Copyright: Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - The dispersion dependences of frequencies of acoustic and optical phonons are calculated and constructed, and the density of states of the phonon spectrum is obtained for Hg2Cl2 crystals. The influence of the hydrostatic pressure on frequencies of acoustic and optical phonons and their dispersion is analyzed theoretically. It is revealed that an increase in the pressure leads to a considerable softening of the slowest acoustic TA branch (soft mode) at the X-point of the Brillouin zone boundary. This behavior is consistent with the phenomenological Landau theory and correlate with experiments.
AB - The dispersion dependences of frequencies of acoustic and optical phonons are calculated and constructed, and the density of states of the phonon spectrum is obtained for Hg2Cl2 crystals. The influence of the hydrostatic pressure on frequencies of acoustic and optical phonons and their dispersion is analyzed theoretically. It is revealed that an increase in the pressure leads to a considerable softening of the slowest acoustic TA branch (soft mode) at the X-point of the Brillouin zone boundary. This behavior is consistent with the phenomenological Landau theory and correlate with experiments.
KW - dispersion branch
KW - Ferroelastic
KW - phase transition
UR - http://www.scopus.com/inward/record.url?scp=77954824467&partnerID=8YFLogxK
U2 - 10.1080/00150193.2010.484732
DO - 10.1080/00150193.2010.484732
M3 - Conference article
AN - SCOPUS:77954824467
VL - 397
SP - 81
EP - 89
JO - Ferroelectrics
JF - Ferroelectrics
SN - 0015-0193
IS - 1
T2 - 6th International Seminar on Ferroelastic Physics, ISFP-6
Y2 - 22 September 2009 through 25 September 2009
ER -
ID: 73027445