Assessment of Strain-Generated Oxygen Vacancies Using SrTiO3 Bicrystals

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dc.contributor.authorChoi, Si-Youngko
dc.contributor.authorKim, Sung-Daeko
dc.contributor.authorChoi, Minseokko
dc.contributor.authorLee, Hak-Sungko
dc.contributor.authorRyu, Jko
dc.contributor.authorShibata, Naoyako
dc.contributor.authorMizoguchi, Teruyasuko
dc.contributor.authorTochigi, Eitako
dc.contributor.authorYamamoto, Takahisako
dc.contributor.authorKang, Suk-Joong Lko
dc.contributor.authorIkuhara, Yuichiko
dc.date.accessioned2015-07-22T05:25:47Z-
dc.date.available2015-07-22T05:25:47Z-
dc.date.created2015-07-14-
dc.date.created2015-07-14-
dc.date.issued2015-06-
dc.identifier.citationNANO LETTERS, v.15, no.6, pp.4129 - 4134-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10203/200096-
dc.description.abstractAtomic-scale defects strongly influence the electrical and optical properties of materials, and their impact can be more pronounced in localized dimensions. Here, we directly demonstrate that strain triggers the formation of oxygen vacancies in complex oxides by examining the tilt boundary of SrTiO3 bicrystals. Through transmission electron microscopy and electron energy loss spectroscopy, we identify strains along the tilt boundary and oxygen vacancies in the strain-imposed regions between dislocation cores. First-principles calculations support that strains, irrespective of their type or sign, lower the formation energy of oxygen vacancies, thereby enhancing vacancy formation. Finally, current-voltage measurements confirm that such oxygen vacancies at the strained boundary result in a decrease of the nonlinearity of the I-V curve as well as the resistivity. Our results strongly indicate that oxygen vacancies are preferentially formed and are segregated at the regions where strains accumulate, such as heterogeneous interfaces and grain boundaries.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subjectGRAIN-BOUNDARIES-
dc.subjectROOM-TEMPERATURE-
dc.subjectSTRONTIUM-TITANATE-
dc.subjectELECTRON-GAS-
dc.subjectINTERFACE-
dc.subjectCHEMISTRY-
dc.subjectDEFECTS-
dc.titleAssessment of Strain-Generated Oxygen Vacancies Using SrTiO3 Bicrystals-
dc.typeArticle-
dc.identifier.wosid000356316900071-
dc.identifier.scopusid2-s2.0-84935851799-
dc.type.rimsART-
dc.citation.volume15-
dc.citation.issue6-
dc.citation.beginningpage4129-
dc.citation.endingpage4134-
dc.citation.publicationnameNANO LETTERS-
dc.identifier.doi10.1021/acs.nanolett.5b01245-
dc.contributor.localauthorKang, Suk-Joong L-
dc.contributor.nonIdAuthorChoi, Si-Young-
dc.contributor.nonIdAuthorKim, Sung-Dae-
dc.contributor.nonIdAuthorChoi, Minseok-
dc.contributor.nonIdAuthorLee, Hak-Sung-
dc.contributor.nonIdAuthorRyu, J-
dc.contributor.nonIdAuthorShibata, Naoya-
dc.contributor.nonIdAuthorMizoguchi, Teruyasu-
dc.contributor.nonIdAuthorTochigi, Eita-
dc.contributor.nonIdAuthorYamamoto, Takahisa-
dc.contributor.nonIdAuthorIkuhara, Yuichi-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorPerovskites-
dc.subject.keywordAuthorstrain engineering oxygen vacancies-
dc.subject.keywordAuthorbicrystals-
dc.subject.keywordPlusGRAIN-BOUNDARIES-
dc.subject.keywordPlusROOM-TEMPERATURE-
dc.subject.keywordPlusSTRONTIUM-TITANATE-
dc.subject.keywordPlusELECTRON-GAS-
dc.subject.keywordPlusINTERFACE-
dc.subject.keywordPlusCHEMISTRY-
dc.subject.keywordPlusDEFECTS-
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