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Conducting interfaces between amorphous oxide layers and SrTiO_3(110) and SrTiO_3(111)

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dc.contributor.authorScigaj, Mateusz
dc.contributor.authorGázquez, Jaume
dc.contributor.authorVarela Del Arco, María
dc.contributor.authorFontcuberta Griñó, Josep
dc.contributor.authorHerranz Casabona, Gervasi
dc.contributor.authorSánchez Barrera, Florencio
dc.date.accessioned2023-06-18T06:50:18Z
dc.date.available2023-06-18T06:50:18Z
dc.date.issued2015-11-15
dc.description© 2015 Elsevier B.V. Financial support by the Spanish Government [Projects MAT2011- 29269-CO3 andMAT2014-56063-C2-1-R] and Generalitat de Catalunya (2014 SGR 734) is acknowledged. MS acknowledges the financial support of the Spanish Government (FPU grant). J.G. acknowledges the Ramon y Cajal program (RYC-2012-11709). Microscopy work has been conducted in the STEMGroup of the Oak Ridge National Laboratory (ORNL). This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences,Materials Science and Engineering Division (MV). Research at UCMis supported by the ERC Starting Investigator Award STEMOX 739239. We thank Dr. A. Pérez del Pino and Dr. R. Pfattner for collaboration in some transport measurements.
dc.description.abstractInterfaces between (110) and (111)SrTiO_3 (STO) single crystalline substrates and amorphous oxide layers, LaAlO_3 (a-LAO), Y:ZrO_2 (a-YSZ), and SrTiO_3 (a-STO) become conducting above a critical thickness tc. Here we show that t_c for a-LAO is not depending on the substrate orientation, i.e. t_c (a-LAO/(110)STO) ≈ t_c(a-LAO/(111)STO) interfaces, whereas it strongly depends on the composition of the amorphous oxide: t_c(a-LAO/(110)STO) < t_c(a-YSZ/(110)STO) < t_c(a-STO/(110)STO). It is concluded that the formation of oxygen vacancies in amorphous-type interfaces is mainly determined by the oxygen affinity of the deposited metal ions, rather than orientational-dependent enthalpy vacancy formation and diffusion. Scanning transmission microscopy characterization of amorphous and crystalline LAO/STO(110) interfaces shows much higher amount of oxygen vacancies in the former, providing experimental evidence of the distinct mechanism of conduction in these interfaces.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipUnión Europea. FP7
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipGeneralitat de Catalunya
dc.description.sponsorshipAyudas para contratos predoctorales de Formación del Profesorado Universitario (FPU), MECD, España
dc.description.sponsorshipMinisterio de Educación, Cultura y Deporte (MECD), España
dc.description.sponsorshipAyudas para contratos Ramón y Cajal (RYC), MINECO, España
dc.description.sponsorshipU.S. Department of Energy, Office of Science, Basic Energy Sciences,Materials Science and Engineering Division (MV)
dc.description.sponsorshipERC Starting Grants
dc.description.sponsorshipEuropean Research Council (ERC)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35978
dc.identifier.doi10.1016/j.ssi.2015.09.002
dc.identifier.issn0167-2738
dc.identifier.officialurlhttp://dx.doi.org/10.1016/j.ssi.2015.09.002
dc.identifier.relatedurlhttp://www.sciencedirect.com/
dc.identifier.relatedurlhttp://www.arxiv.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/24360
dc.journal.titleSolid State Ionics
dc.language.isoeng
dc.page.final72
dc.page.initial68
dc.publisherELSEVIER SCIENCE BV
dc.relation.projectIDSTEMOX (239739)
dc.relation.projectIDMAT2011- 29269-CO3
dc.relation.projectIDMAT2014-56063-C2-1-R
dc.relation.projectID2014 SGR 734
dc.relation.projectIDRYC-2012-11709
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.keywordOxide interfaces
dc.subject.keywordOxygen vacancies
dc.subject.keywordLaAlO_3/SrTiO_3
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleConducting interfaces between amorphous oxide layers and SrTiO_3(110) and SrTiO_3(111)
dc.typejournal article
dc.volume.number281
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