Discontinuity of the Corner-shared Octahedral Network at the Interface of BiFeO<sub>3</sub>/SrTiO<sub>3</sub>

POSTER

Abstract

Controlling the interface of complex oxide heterostructures at atomic level has led to novel properties and functionalities. Bulk properties of the film and the interaction between the substrate and the film strongly rely on the exact interface configurations. Here, using reactive molecular beam epitaxy, we investigate the complex atomic configurations at the interface of BiFeO3/(001)SrTiO3. We observe an intriguing rock-salt like BiO2 double layer at the interface grown on TiO2-terminated SrTiO3 substrate. The existence of double-layer structure results in a discontinuity of the corner-shared octahedral network at the interface, which debilitates the interaction between the film and substrate. For the BiFeO3 film grown on SrO-terminated SrTiO3 substrate, however, no such rock-salt like double layer is observed. The underlying mechanism for the formation of distinct types of interface configurations is explained by first-principles calculations. Our work demonstrates that the oxygen octahedral coupling crossing the interface can be engineered by controlling the exact termination of the substrates.

*We thank the National Basic Research Program of China (2015CB654901) and the National Natural Science Foundation of China (11574135, 51672125, 11474147).

Presenters

  • Dianxiang Ji

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

Authors

  • Dianxiang Ji

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Min Gu

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Chunchen Zhang

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Zhengbin Gu

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Sebastian Reyes-Lillo

    • Departamento de Ciencias Físicas, Universidad Nacional Andre Bello
    • Departamento de Ciencias Fisicas, Universidad Andres Bello
    • Departamento de Ciencias Fisicas UNAB; Molecular Foundry LBNL

  • Jeffrey Neaton

    • Molecular Foundry, Lawrence Berkeley National Laboratory; Department of Physics, University of California, Berkeley; Kavli Energy Nanosciences Institute at Berkeley
    • Physics, University of California, Berkeley; Lawrence Berkeley National Laboratory
    • Department of Physics, University of California
    • Univ of California - Berkeley
    • Lawrence Berkeley Natl Lab
    • Materials Science Division, Lawrence Berkeley National Laboratory
    • Molecular Foundry, Lawrence Berkeley National Lab
    • Physics, University of California, Berkeley
    • Department of Physics UCB; Molecular Foundry LBNL; Kavli ENSI
    • Lawrence Berkeley National Laboratory
    • Department of Physics, Univ of California - Berkeley
    • Lawrence Berkeley National Lab and University of California - Berkeley

  • Peng Wang

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Yuefeng Nie

    • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing Unive

  • Xiaoqing Pan

    • University of California
    • Departments of Chemical Engineering and Materials Science and Department of Physics and Astronomy, University of California
    • Department of Chemical Engineering and Materials Science and Department of Physics and Astronomy, University of California