Electronic Symmetry of La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/SrTiO<sub>3</sub> Interfaces as a Function of Film Thickness

ORAL

Abstract

Second harmonic generation (SHG) is a well known optical technique for probing electronic symmetry originating from regions of broken symmetries. For La0.67Sr0.33MnO3/SrTiO3 (LSMO/STO) buried interfaces, rotational anisotropic SHG is capable of characterizing interfacial electronic symmetry. Using film thickness and growth conditions to control the interface structure for LSMO/STO buried interfaces, induced changes in the electronic symmetry are detected with rotational anisotropic SHG. Data accumulated for LSMO/STO demonstrates thickness-dependent enhanced four-fold electronic symmetry patterns which are contrary to the measured C4v electronic symmetry measured using atomically resolved electron microscopy and spectroscopy. Furthermore, the relative angles of the peak intensities between in-plane and out-of-plane polarization geometries varies with film thickness. Rotational anisotropy SHG of LSMO/STO thin films will be presented from <5 unit cell to 300+ unit cell LSMO/STO heterostructures.

*Supported by U.S. NSF through grant No. DMR-1504226. Thin films are grown by DoE grant No. DE-SC0002136.

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Presenters

  • Joel E Taylor

    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge

Authors

  • Joel E Taylor

    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge

  • Kun Zhao

    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge

  • Mohammad Saghayezhian

    • Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University
    • Louisiana State University
    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge
    • Physics and astronomy, Louisiana State University

  • Jiandi Zhang

    • Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University
    • Louisiana State University
    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge
    • Physics and astronomy, Louisiana State University

  • Louis H Haber

    • Department of Chemistry, Louisiana State University
    • Department of Chemistry, Louisiana State University, Baton Rouge

  • E Ward Plummer

    • Louisiana State University
    • Department of Physics & Astronomy, Louisiana State University
    • Dept. of Physics and Astronomy, Louisiana State University, USA
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge
    • Physics and astronomy, Louisiana State University