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Title: Strain coupling of oxygen non-stoichiometry in perovskite thin films

Abstract

The effects of strain and oxygen vacancies on perovskite thin films have been studied in great detail over the past decades and have been treated separately from each other. While epitaxial strain has been realized as a tuning knob to tailor the functional properties of correlated oxides, oxygen vacancies are usually regarded as undesirable and detrimental. In transition metal oxides, oxygen defects strongly modify the properties and functionalities via changes in oxidation states of the transition metals. However, such coupling is not well understood in epitaxial films, but rather deemed as cumbersome or experimental artifact. Only recently it has been recognized that lattice strain and oxygen non-stoichiometry are strongly correlated in a vast number of perovskite systems and that this coupling can be beneficial for information and energy technologies. Recent experimental and theoretical studies have focused on understanding the correlated phenomena between strain and oxygen vacancies for a wide range of perovskite systems. These correlations not only include the direct relationship between elastic strain and the formation energy of oxygen vacancies, but also comprise highly complex interactions such as strain-induced phase transitions due to oxygen vacancy ordering. Therefore, we aim in this review to give a comprehensive overview on themore » coupling between strain and oxygen vacancies in perovskite oxides and point out the potential applications of the emergent functionalities strongly coupled to oxygen vacancies.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1414713
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 29; Journal Issue: 49; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; thin films; strain; oxygen vacancies; ion conductors; perovskites

Citation Formats

Herklotz, Andreas, Lee, Dongkyu, Guo, Er-Jia, Meyer, Tricia L., Petrie, Jonathan R., and Lee, Ho Nyung. Strain coupling of oxygen non-stoichiometry in perovskite thin films. United States: N. p., 2017. Web. doi:10.1088/1361-648X/aa949b.
Herklotz, Andreas, Lee, Dongkyu, Guo, Er-Jia, Meyer, Tricia L., Petrie, Jonathan R., & Lee, Ho Nyung. Strain coupling of oxygen non-stoichiometry in perovskite thin films. United States. doi:10.1088/1361-648X/aa949b.
Herklotz, Andreas, Lee, Dongkyu, Guo, Er-Jia, Meyer, Tricia L., Petrie, Jonathan R., and Lee, Ho Nyung. Mon . "Strain coupling of oxygen non-stoichiometry in perovskite thin films". United States. doi:10.1088/1361-648X/aa949b.
@article{osti_1414713,
title = {Strain coupling of oxygen non-stoichiometry in perovskite thin films},
author = {Herklotz, Andreas and Lee, Dongkyu and Guo, Er-Jia and Meyer, Tricia L. and Petrie, Jonathan R. and Lee, Ho Nyung},
abstractNote = {The effects of strain and oxygen vacancies on perovskite thin films have been studied in great detail over the past decades and have been treated separately from each other. While epitaxial strain has been realized as a tuning knob to tailor the functional properties of correlated oxides, oxygen vacancies are usually regarded as undesirable and detrimental. In transition metal oxides, oxygen defects strongly modify the properties and functionalities via changes in oxidation states of the transition metals. However, such coupling is not well understood in epitaxial films, but rather deemed as cumbersome or experimental artifact. Only recently it has been recognized that lattice strain and oxygen non-stoichiometry are strongly correlated in a vast number of perovskite systems and that this coupling can be beneficial for information and energy technologies. Recent experimental and theoretical studies have focused on understanding the correlated phenomena between strain and oxygen vacancies for a wide range of perovskite systems. These correlations not only include the direct relationship between elastic strain and the formation energy of oxygen vacancies, but also comprise highly complex interactions such as strain-induced phase transitions due to oxygen vacancy ordering. Therefore, we aim in this review to give a comprehensive overview on the coupling between strain and oxygen vacancies in perovskite oxides and point out the potential applications of the emergent functionalities strongly coupled to oxygen vacancies.},
doi = {10.1088/1361-648X/aa949b},
journal = {Journal of Physics. Condensed Matter},
issn = {0953-8984},
number = 49,
volume = 29,
place = {United States},
year = {2017},
month = {11}
}