2D Electron Gas with 100% Spin-Polarization in the (LaMnO3)2/(SrTiO3)2 Superlattice under Uniaxial Strain

Handle URI:
http://hdl.handle.net/10754/594100
Title:
2D Electron Gas with 100% Spin-Polarization in the (LaMnO<sub>3</sub>)<sub>2</sub>/(SrTiO<sub>3</sub>)<sub>2</sub> Superlattice under Uniaxial Strain
Authors:
Cossu, Fabrizio; Jilili, J.; Schwingenschlögl, Udo ( 0000-0003-4179-7231 )
Abstract:
By first-principles calculations we investigate the structural, electronic, and magnetic properties of the (LaMnO3)2/(SrTiO3)2 superlattice. We find that a monoclinic C2h symmetry is energetically favorable and that the spins order ferromagnetically. Under both compressive and tensile uniaxial strain the electronic structure of the superlattice shows a half-metallic character. In particular, a fully spin-polarized two-dimensional electron gas, which traces back to the Ti 3dxy orbitals, is achieved under compressive uniaxial strain. The (LaMnO3)2/(SrTiO3)2 superlattice is analysed with respect to its structure, magnetism, and electronic properties. Our results demonstrate that uniaxial strain in an experimentally accessible range, both tensile and compressive, can be used to induce half-metallicity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Cossu F, Jilili J, Schwingenschlögl U (2014) 2D Electron Gas with 100% Spin-Polarization in the (LaMnO 3 ) 2 /(SrTiO 3 ) 2 Superlattice under Uniaxial Strain . Advanced Materials Interfaces 1: n/a–n/a. Available: http://dx.doi.org/10.1002/admi.201400057.
Publisher:
Wiley-Blackwell
Journal:
Advanced Materials Interfaces
Issue Date:
28-Jul-2014
DOI:
10.1002/admi.201400057
Type:
Article
ISSN:
2196-7350
Sponsors:
We thank N. Singh for fruitful discussions, L.-Y. Gan for technical support, and the KAUST research computing team for supplying the computational resources for this study. The calculations were performed on a Linux cluster with Intel Xeon X5570 X86-64 CPU architecture. Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCossu, Fabrizioen
dc.contributor.authorJilili, J.en
dc.contributor.authorSchwingenschlögl, Udoen
dc.date.accessioned2016-01-19T13:21:38Zen
dc.date.available2016-01-19T13:21:38Zen
dc.date.issued2014-07-28en
dc.identifier.citationCossu F, Jilili J, Schwingenschlögl U (2014) 2D Electron Gas with 100% Spin-Polarization in the (LaMnO 3 ) 2 /(SrTiO 3 ) 2 Superlattice under Uniaxial Strain . Advanced Materials Interfaces 1: n/a–n/a. Available: http://dx.doi.org/10.1002/admi.201400057.en
dc.identifier.issn2196-7350en
dc.identifier.doi10.1002/admi.201400057en
dc.identifier.urihttp://hdl.handle.net/10754/594100en
dc.description.abstractBy first-principles calculations we investigate the structural, electronic, and magnetic properties of the (LaMnO3)2/(SrTiO3)2 superlattice. We find that a monoclinic C2h symmetry is energetically favorable and that the spins order ferromagnetically. Under both compressive and tensile uniaxial strain the electronic structure of the superlattice shows a half-metallic character. In particular, a fully spin-polarized two-dimensional electron gas, which traces back to the Ti 3dxy orbitals, is achieved under compressive uniaxial strain. The (LaMnO3)2/(SrTiO3)2 superlattice is analysed with respect to its structure, magnetism, and electronic properties. Our results demonstrate that uniaxial strain in an experimentally accessible range, both tensile and compressive, can be used to induce half-metallicity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en
dc.description.sponsorshipWe thank N. Singh for fruitful discussions, L.-Y. Gan for technical support, and the KAUST research computing team for supplying the computational resources for this study. The calculations were performed on a Linux cluster with Intel Xeon X5570 X86-64 CPU architecture. Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST).en
dc.publisherWiley-Blackwellen
dc.subject2D electron gasen
dc.subjectinterfaceen
dc.subjectspin-polarizationen
dc.subjectsuperlatticeen
dc.title2D Electron Gas with 100% Spin-Polarization in the (LaMnO<sub>3</sub>)<sub>2</sub>/(SrTiO<sub>3</sub>)<sub>2</sub> Superlattice under Uniaxial Strainen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalAdvanced Materials Interfacesen
kaust.authorCossu, Fabrizioen
kaust.authorJilili, J.en
kaust.authorSchwingenschlögl, Udoen
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