Charge transport in epitaxial barium titanate films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00539019" target="_blank" >RIV/68378271:_____/20:00539019 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.101.094106" target="_blank" >https://doi.org/10.1103/PhysRevB.101.094106</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.101.094106" target="_blank" >10.1103/PhysRevB.101.094106</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Charge transport in epitaxial barium titanate films

Popis výsledku v původním jazyce

The electrical conductivity of epitaxial BaTiO3 films was studied by small-signal impedance spectroscopy at temperatures of 10–720 K using Pt-BaTiO3-SrRuO3 capacitors. The ∼150-nm-thick BaTiO3 films possessed different lattice strains and degrees of oxygen deficiency. A crossover between the low-temperature hopping of small polarons and the high-temperature semiconductor- to metal-type behavior was demonstrated in all films. It was suggested that the small electron polarons originate from self-trapping at Ti in the stoichiometric tensilestrained film and from trapping at Ti next to the oxygen vacancy in the oxygen-deficient films. The conductionband transport was ascribed to the thermally activated release of the trapped electrons. It was pointed out that the electronic release can mimic the motion of oxygen vacancies, which are actually immobile.

Název v anglickém jazyce

Charge transport in epitaxial barium titanate films

Popis výsledku anglicky

The electrical conductivity of epitaxial BaTiO3 films was studied by small-signal impedance spectroscopy at temperatures of 10–720 K using Pt-BaTiO3-SrRuO3 capacitors. The ∼150-nm-thick BaTiO3 films possessed different lattice strains and degrees of oxygen deficiency. A crossover between the low-temperature hopping of small polarons and the high-temperature semiconductor- to metal-type behavior was demonstrated in all films. It was suggested that the small electron polarons originate from self-trapping at Ti in the stoichiometric tensilestrained film and from trapping at Ti next to the oxygen vacancy in the oxygen-deficient films. The conductionband transport was ascribed to the thermally activated release of the trapped electrons. It was pointed out that the electronic release can mimic the motion of oxygen vacancies, which are actually immobile.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

101

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000521073100001

EID výsledku v databázi Scopus

2-s2.0-85083241141