Vibrational modes and overlap matrix of LiNb1-xTaxO3 mixed crystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00504703" target="_blank" >RIV/68378271:_____/19:00504703 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/physrevb.99.094306" target="_blank" >https://doi.org/10.1103/physrevb.99.094306</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.99.094306" target="_blank" >10.1103/PhysRevB.99.094306</a>
Alternative languages
Result language
angličtina
Original language name
Vibrational modes and overlap matrix of LiNb1-xTaxO3 mixed crystals
Original language description
The wave numbers and strengths of the lattice vibrational modes of LiNbO3-LiTaO3 solid solutions have been studied by Raman and IR spectroscopy. The substitution of Nb by Ta induces shifts of wave numbers and intensities of phonon modes indicating a one-phonon behavior. The wave numbers of low-frequency vibrations soften with the increased atomic mass. The frequencies of most of the high-frequency modes increase with the Ta/Nb ratio. A qualitative relation between the shift of transverse and longitudinal modes in the solid solutions has been found on the basis of an overlap matrix. The exceptional softening of several high-frequency modes with the replacement of Nb by Ta originates from strong interaction of these modes with modes at low frequencies according to the overlap matrix. The intensities of the Raman modes are strongly modulated by the electronic properties with Ta/Nb substitution and this explains their role in the physical properties of LiNbO3 and LiTaO3.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
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Volume of the periodical
99
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
1-13
UT code for WoS article
000461052000001
EID of the result in the Scopus database
2-s2.0-85063142852