Interfacial electronic states and correlated magnetic order across BiFeO3/La0.7Sr0.3MnO3 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).

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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