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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF16_019%2F0000760" target="_blank" >EF16_019/0000760: Fyzika pevných látek pro 21. století</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Strontium titanate: Synthesis, properties and uses

ISBN

978-1-53615-437-5

Počet stran výsledku

39

Strana od-do

1-39

Počet stran knihy

346

Název nakladatele

Nova Science Publishers, Inc

Místo vydání

New York

Kód UT WoS kapitoly

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