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dc.contributor.authorCaffrey, Nuala Mai
dc.contributor.authorArcher, Thomas
dc.contributor.authorRungger, Ivan
dc.contributor.authorSanvito, Stefano
dc.date.accessioned2016-02-25T12:56:49Z
dc.date.available2016-02-25T12:56:49Z
dc.date.issued2012-11-30
dc.identifier.citationCaffrey NM, Archer T, Rungger I, Sanvito S (2012) Coexistance of Giant Tunneling Electroresistance and Magnetoresistance in an All-Oxide Composite Magnetic Tunnel Junction. Physical Review Letters 109. Available: http://dx.doi.org/10.1103/PhysRevLett.109.226803.
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.pmid23368147
dc.identifier.doi10.1103/PhysRevLett.109.226803
dc.identifier.urihttp://hdl.handle.net/10754/597793
dc.description.abstractWe propose, by performing advanced abinitio electron transport calculations, an all-oxide composite magnetic tunnel junction, within which both large tunneling magnetoresistance (TMR) and tunneling electroresistance (TER) effects can coexist. The TMR originates from the symmetry-driven spin filtering provided by an insulating BaTiO3 barrier to the electrons injected from the SrRuO3 electrodes. Following recent theoretical suggestions, the TER effect is achieved by intercalating a thin insulating layer, here SrTiO3, at one of the SrRuO3/BaTiO3 interfaces. As the complex band structure of SrTiO3 has the same symmetry as that of BaTiO3, the inclusion of such an intercalated layer does not negatively alter the TMR and in fact increases it. Crucially, the magnitude of the TER also scales with the thickness of the SrTiO3 layer. The SrTiO3 thickness becomes then a single control parameter for both the TMR and the TER effect. This protocol offers a practical way to the fabrication of four-state memory cells. © 2012 American Physical Society.
dc.description.sponsorshipThis work is sponsored by Science Foundation of Ireland (07/IN.1/I945) and by the EU-FP7 (ATHENA and iFOX projects). I. R. is sponsored by the King Abdullah University of Science and Technology (ACRAB project). Computational resources have been provided by the HEA IITAC project managed by TCHPC.
dc.publisherAmerican Physical Society (APS)
dc.titleCoexistance of Giant Tunneling Electroresistance and Magnetoresistance in an All-Oxide Composite Magnetic Tunnel Junction
dc.typeArticle
dc.identifier.journalPhysical Review Letters
dc.contributor.institutionTrinity College Dublin, Dublin, Ireland


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