Ferroelectric tunnel junctions with graphene electrodes

H. Lu, A. Lipatov, S. Ryu, D. J. Kim, H. Lee, M. Y. Zhuravlev, C. B. Eom, E. Y. Tsymbal, Alexander Sinitskii, A. Gruverman

Research output: Contribution to journalArticle

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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/BaTiO 3 interface. For the FTJ with the interfacial ammonia layer we find an enhanced tunnelling electroresistance (TER) effect of 6 × 10 5 %. 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.

Original languageEnglish (US)
Article number5518
JournalNature communications
Volume5
DOIs
StatePublished - 2014

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Tunnel junctions
tunnel junctions
Ferroelectric materials
graphene
Electrodes
electrodes
Equipment and Supplies
polarization
Polarization
Physics
Ammonia
augmentation
electrode materials
logic
Logic devices
ammonia
engineering
boundary conditions
physics

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Lu, H., Lipatov, A., Ryu, S., Kim, D. J., Lee, H., Zhuravlev, M. Y., ... Gruverman, A. (2014). Ferroelectric tunnel junctions with graphene electrodes. Nature communications, 5, [5518]. https://doi.org/10.1038/ncomms6518

Ferroelectric tunnel junctions with graphene electrodes. / Lu, H.; Lipatov, A.; Ryu, S.; Kim, D. J.; Lee, H.; Zhuravlev, M. Y.; Eom, C. B.; Tsymbal, E. Y.; Sinitskii, Alexander; Gruverman, A.

In: Nature communications, Vol. 5, 5518, 2014.

Research output: Contribution to journalArticle

Lu, H, Lipatov, A, Ryu, S, Kim, DJ, Lee, H, Zhuravlev, MY, Eom, CB, Tsymbal, EY, Sinitskii, A & Gruverman, A 2014, 'Ferroelectric tunnel junctions with graphene electrodes', Nature communications, vol. 5, 5518. https://doi.org/10.1038/ncomms6518
Lu H, Lipatov A, Ryu S, Kim DJ, Lee H, Zhuravlev MY et al. Ferroelectric tunnel junctions with graphene electrodes. Nature communications. 2014;5. 5518. https://doi.org/10.1038/ncomms6518
Lu, H. ; Lipatov, A. ; Ryu, S. ; Kim, D. J. ; Lee, H. ; Zhuravlev, M. Y. ; Eom, C. B. ; Tsymbal, E. Y. ; Sinitskii, Alexander ; Gruverman, A. / Ferroelectric tunnel junctions with graphene electrodes. In: Nature communications. 2014 ; Vol. 5.
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