Thermooptical evidence of carrier-stabilized ferroelectricity in ultrathin electrodeless films

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00491130" target="_blank" >RIV/68378271:_____/18:00491130 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41598-018-26933-0" target="_blank" >http://dx.doi.org/10.1038/s41598-018-26933-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-018-26933-0" target="_blank" >10.1038/s41598-018-26933-0</a>

Result language

angličtina

Original language name

Thermooptical evidence of carrier-stabilized ferroelectricity in ultrathin electrodeless films

Original language description

Ferroelectric films may lose polarization as their thicknesses decrease to a few nanometers because of the depolarizing field that opposes the polarization therein. The depolarizing field is minimized when electrons or ions in the electrodes or the surface/interface layers screen the polarization charge or when peculiar domain configuration is formed. Here, we demonstrate ferroelectric phase transitions using thermooptical studies in similar to 5-nm-thick epitaxial Pb0.5Sr0.5TiO3 films grown on different insulating substrates. By comparing theoretical modeling and experimental observations, we show that ferroelectricity is stabilized through redistribution of charge carriers (electrons or holes) inside ultrathin films. The related high-density of screening carriers is confined within a few-nanometers-thick layer in the vicinity of the insulator, thus resembling a two-dimensional carrier gas.

Czech name

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Czech description

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Type

J_imp - 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.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

May

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

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UT code for WoS article

000433547600058

EID of the result in the Scopus database

2-s2.0-85048035027