Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite

Handle URI:
http://hdl.handle.net/10754/555673
Title:
Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite
Authors:
David, Adrian; Tian, Yufeng; Yang, Ping; Gao, Xingyu; Lin, Weinan; Shah, Amish B.; Zuo, Jian-Min; Prellier, Wilfrid; Wu, Tao ( 0000-0003-0845-4827 )
Abstract:
Modulation of resistance by an external magnetic field, i.e. magnetoresistance effect, has been a long-lived theme of research due to both fundamental science and device applications. Here we report colossal positive magnetoresistance (CPMR) (>30,000% at a temperature of 2 K and a magnetic field of 9 T) discovered in degenerate semiconducting strontium titanite (SrTiO3) single crystals capped with ultrathin SrTiO3/LaAlO3 bilayers. The low-pressure high-temperature homoepitaxial growth of several unit cells of SrTiO3 introduces oxygen vacancies and high-mobility carriers in the bulk SrTiO3, and the three-unit-cell LaAlO3 capping layer passivates the surface and improves carrier mobility by suppressing surface-defect-related scattering. The coexistence of multiple types of carriers and inhomogeneous transport lead to the emergence of CPMR. This unit-cell-level surface engineering approach is promising to be generalized to others oxides, and to realize devices with high-mobility carriers and interesting magnetoelectronic properties.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite 2015, 5:10255 Scientific Reports
Publisher:
Nature Publishing Group
Journal:
Scientific Reports
Issue Date:
15-May-2015
DOI:
10.1038/srep10255
Type:
Article
ISSN:
2045-2322
Additional Links:
http://www.nature.com/doifinder/10.1038/srep10255
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDavid, Adrianen
dc.contributor.authorTian, Yufengen
dc.contributor.authorYang, Pingen
dc.contributor.authorGao, Xingyuen
dc.contributor.authorLin, Weinanen
dc.contributor.authorShah, Amish B.en
dc.contributor.authorZuo, Jian-Minen
dc.contributor.authorPrellier, Wilfriden
dc.contributor.authorWu, Taoen
dc.date.accessioned2015-05-25T08:35:14Zen
dc.date.available2015-05-25T08:35:14Zen
dc.date.issued2015-05-15en
dc.identifier.citationColossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite 2015, 5:10255 Scientific Reportsen
dc.identifier.issn2045-2322en
dc.identifier.doi10.1038/srep10255en
dc.identifier.urihttp://hdl.handle.net/10754/555673en
dc.description.abstractModulation of resistance by an external magnetic field, i.e. magnetoresistance effect, has been a long-lived theme of research due to both fundamental science and device applications. Here we report colossal positive magnetoresistance (CPMR) (>30,000% at a temperature of 2 K and a magnetic field of 9 T) discovered in degenerate semiconducting strontium titanite (SrTiO3) single crystals capped with ultrathin SrTiO3/LaAlO3 bilayers. The low-pressure high-temperature homoepitaxial growth of several unit cells of SrTiO3 introduces oxygen vacancies and high-mobility carriers in the bulk SrTiO3, and the three-unit-cell LaAlO3 capping layer passivates the surface and improves carrier mobility by suppressing surface-defect-related scattering. The coexistence of multiple types of carriers and inhomogeneous transport lead to the emergence of CPMR. This unit-cell-level surface engineering approach is promising to be generalized to others oxides, and to realize devices with high-mobility carriers and interesting magnetoelectronic properties.en
dc.publisherNature Publishing Groupen
dc.relation.urlhttp://www.nature.com/doifinder/10.1038/srep10255en
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.subjectElectronic properties and materialsen
dc.subjectElectronic and spintronic devicesen
dc.titleColossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titaniteen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalScientific Reportsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singaporeen
dc.contributor.institutionSchool of Physics, National Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. Chinaen
dc.contributor.institutionSingapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore 117603, Singaporeen
dc.contributor.institutionShanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. Chinaen
dc.contributor.institutionMaterials Science and Engineering and Materials Research Laboratory, University of Illinois, Urbana-Champaign 1304 W Green Street Urbana, IL 61801, USAen
dc.contributor.institutionLaboratoire CRISMAT, ENSICAEN, CNRS UMR 6508, 6 Boulevard Maréchal Juin, F-14050 Caen Cedex, Franceen
kaust.authorWu, Taoen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.