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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

  • Czech description

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

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

  • 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