Soft polar phonon mode in SrTiO3 single crystals, ceramics and thin films

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00521120" target="_blank" >RIV/68378271:_____/19:00521120 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Soft polar phonon mode in SrTiO3 single crystals, ceramics and thin films
Original language description
SrTiO3 (STO) is the best known incipient ferroelectric, in which the polar soft mode (SM) is responsible for the strong temperature dependence of the linear dielectric properties up to the infrared (IR) range, providing an increase in the low-frequency permittivity from ~300 at room temperature up to more than 20,000 at 5 K. In this review, we summarise the polar SM behaviour in STO single crystals, ceramics, nanoceramics, powders, thin films, and superlattice structures. The SM behaviour in single crystals can be directly compared with microscopic models and first-principle studies relevant for describing the bulk phonon properties in infinite crystals. However, the measured effective SM behaviour in all other types of the mentioned samples is influenced by low-permittivity grain-boundary layers, so-called dead layers, which produce the depolarising field. The review summarises the most relevant experiments devoted to the SM behaviour in all these types of STO materials.n
Czech name
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Czech description
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Type
C - Chapter in a specialist book
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/EF16_019%2F0000760" target="_blank" >EF16_019/0000760: Solid State Physics for 21st century</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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