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    2D Electron Gas with 100% Spin-Polarization in the $(LaMnO_{3})_{2}/(SrTiO_{3})_{2}$ Superlattice under Uniaxial Strain

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    Type
    Article
    Authors
    Cossu, Fabrizio
    Jiwuer, Jilili cc
    Schwingenschlögl, Udo cc
    KAUST Department
    Computational Physics and Materials Science (CPMS)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-07-28
    Online Publication Date
    2014-07-28
    Print Publication Date
    2014-11
    Permanent link to this record
    http://hdl.handle.net/10754/594100
    
    Metadata
    Show full item record
    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.
    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.
    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).
    Publisher
    Wiley
    Journal
    Advanced Materials Interfaces
    DOI
    10.1002/admi.201400057
    ae974a485f413a2113503eed53cd6c53
    10.1002/admi.201400057
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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