Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO3

Authors

  • Won-Mo Lee,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
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  • Ji Ho Sung,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
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  • Kanghyun Chu,

    1. Department of Physics, KAIST, Daejeon, 305-701, Korea
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  • Xavier Moya,

    1. Department of Materials Science, University of Cambridge, Cambridge CB2 3QZ, UK
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  • Donghun Lee,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
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  • Cheol-Joo Kim,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
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  • Neil D. Mathur,

    1. Department of Materials Science, University of Cambridge, Cambridge CB2 3QZ, UK
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  • S.-W. Cheong,

    1. Rutgers Center for Emergent Materials, Department of Physics & Astronomy, Rutgers University, Piscataway, NJ, USA and Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
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  • C.-H. Yang,

    1. Department of Physics and KAIST Institute for the NanoCentury, KAIST, Yuseong-gu, Daejeon, 305-701, Korea
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  • Moon-Ho Jo

    Corresponding author
    1. Department of Materials Science and Engineering and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea
    • Department of Materials Science and Engineering and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam Gu, Pohang, Gyungbuk, 790-784, Korea.
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Abstract

original image

Potential gradients due to the spontaneous polarization of BiFeO3 yield asymmetric and nonlinear photocarrier dynamics. Photocurrent direction is determined by local ferroelectric domain orientation, whereas magnitude is spectrally centered around charged domain walls that are associated with oxygen vacancy migration. Photodetection can be electrically controlled by manipulating ferroelectric domain configurations.

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