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Ferroelectric tunnel junctions with graphene electrodes

Author

Listed:
  • H. Lu

    (University of Nebraska)

  • A. Lipatov

    (University of Lincoln)

  • S. Ryu

    (University of Wisconsin)

  • D. J. Kim

    (University of Nebraska)

  • H. Lee

    (University of Wisconsin)

  • M. Y. Zhuravlev

    (University of Nebraska
    Kurnakov Institute for General and Inorganic Chemistry, RAS
    Faculty of Liberal Arts and Sciences, St Petersburg State University)

  • C. B. Eom

    (University of Wisconsin)

  • E. Y. Tsymbal

    (University of Nebraska
    Nebraska Center for Materials and Nanoscience, University of Nebraska)

  • A. Sinitskii

    (University of Lincoln
    Nebraska Center for Materials and Nanoscience, University of Nebraska)

  • A. Gruverman

    (University of Nebraska
    Nebraska Center for Materials and Nanoscience, University of Nebraska)

Abstract

Polarization-driven resistive switching in ferroelectric tunnel junctions (FTJs)—structures composed of two electrodes separated by an ultrathin ferroelectric barrier—offers new physics and materials functionalities, as well as exciting opportunities for the next generation of non-volatile memories and logic devices. Performance of FTJs is highly sensitive to the electrical boundary conditions, which can be controlled by electrode material and/or interface engineering. Here, we demonstrate the use of graphene as electrodes in FTJs that allows control of interface properties for significant enhancement of device performance. Ferroelectric polarization stability and resistive switching are strongly affected by a molecular layer at the graphene/BaTiO3 interface. For the FTJ with the interfacial ammonia layer we find an enhanced tunnelling electroresistance (TER) effect of 6 × 105%. The obtained results demonstrate a new approach based on using graphene electrodes for interface-facilitated polarization stability and enhancement of the TER effect, which can be exploited in the FTJ-based devices.

Suggested Citation

  • H. Lu & A. Lipatov & S. Ryu & D. J. Kim & H. Lee & M. Y. Zhuravlev & C. B. Eom & E. Y. Tsymbal & A. Sinitskii & A. Gruverman, 2014. "Ferroelectric tunnel junctions with graphene electrodes," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6518
    DOI: 10.1038/ncomms6518
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    Cited by:

    1. Li, Yong & Yang, Jie & Song, Jian, 2017. "Nano energy system model and nanoscale effect of graphene battery in renewable energy electric vehicle," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 652-663.

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