Interfacial electronic states and correlated magnetic order across BiFeO<sub>3</sub>/La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> complex oxide heterointerfaces

ORAL

Abstract

Atomic-scale electronic states across termination engineered BiFeO3/La0.7Sr0.3MnO3 (BFO/LSMO) complex oxide heterointerfaces have been revealed using cross-sectional scanning tunneling microscopy and spectroscopy. The evolution of the Mn, O, and Fe states across MnO2-BiO and La0.7Sr0.3O-FeO2 interfaces are demonstrated. Analysis of spectroscopy provides the electronic results of interfacial band gaps and interface bound charges at two kinds of terminations in the BFO/LSMO system. The result exhibits the MnO2-BiO terminated interface with wide band gaps and dominant Mn4+ oxidation state, which can refer to an antiferromagnetic state at the interface. In contrast, the metallic behavior of the La0.7Sr0.3O-FeO2 terminated interface can be correlated to the ferromagnetism at the interface.
Reference:
B.-C. Huang, P. Yu, Y. H. Chu, C.-S. Chang, R. Ramesh, R. E. Dunin-Borkowski, P. Ebert, and Y.-P. Chiu, ACS Nano 12, 1089 (2018).

*This work was supported by Ministry of Science and Technology of Taiwan, ROC under contrasts MOST 106-2628-M-002-011-MY3.

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Presenters

  • Bo-Chao Huang

    • Department of Physics, National Taiwan University, Taipei, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan; and Institute of Atomic and Molecular Sciences,

Authors

  • Bo-Chao Huang

    • Department of Physics, National Taiwan University, Taipei, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan; and Institute of Atomic and Molecular Sciences,

  • Pu Yu

    • State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, and Collaborative Innovation Center of Quantum Matter, Beijing, China; an
    • Tsinghua University

  • Ying-Hao Chu

    • Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan
    • Department of Materials Science and Engineering, National Chiao Tung University
    • National Chiao Tung University
    • Materials Science and Engineering, National Chiao Tung University
    • National Chiao Tung University, Hsinchu 30010, Taiwan

  • Chia-Seng Chang

    • Institute of Physics, Academia Sinica, Taipei, Taiwan
    • Institute of Physics, Academia Sinica

  • R Ramesh

    • Department of Physics, University of California Berkeley, California, USA
    • Department of Materials Science and Engineering, University of California at Berkeley
    • Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA.
    • Department of Materials Science and Engineering, University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • R. E. Dunin-Borkowski

    • Peter Grünberg Institut, Forschungszentrum Jülich GmbH, Jülich, Germany

  • Ph. Ebert

    • Peter Grünberg Institut, Forschungszentrum Jülich GmbH, Jülich, Germany

  • Ya-Ping Chiu

    • Department of Physics, National Taiwan University, Taipei, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan