A possible scenario for two soft branches in PMN
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F11%3A00365357" target="_blank" >RIV/68378271:_____/11:00365357 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1080/01411594.2011.558278" target="_blank" >http://dx.doi.org/10.1080/01411594.2011.558278</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/01411594.2011.558278" target="_blank" >10.1080/01411594.2011.558278</a>
Alternative languages
Result language
angličtina
Original language name
A possible scenario for two soft branches in PMN
Original language description
The acoustic?optic mode coupling model in lead-based perovskite relaxors has been extended by taking into account the two-component nature of the lowest frequency optic phonon mode. Inelastic scattering spectral function and the course of the apparent phonon dispersion branches were calculated for parameters relevant to Pb(Mg1/3Nb2/3)O3 (PMN) relaxor. Dynamical parameters of the zone-centre soft mode components in the problematic region around the Burns temperature have been described with the help of the recent hyper-Raman scattering study on PMN. We show that the vertical dispersion (waterfall anomaly) is primarily due to the coupling of the transverse acoustic branch to the lower frequency component of the TO1 phonon branch. As in the inelastic neutron scattering experiments, in this model the temperature interval in which the waterfall anomaly appears is roughly restricted by the freezing and Burns temperatures.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP204%2F10%2F0616" target="_blank" >GAP204/10/0616: Modern piezoelectric perovskites: lattice vibrations and domain walls</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Phase Transitions
ISSN
0141-1594
e-ISSN
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Volume of the periodical
84
Issue of the periodical within the volume
9
Country of publishing house
GB - UNITED KINGDOM
Number of pages
5
Pages from-to
784-788
UT code for WoS article
000299704600008
EID of the result in the Scopus database
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