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Ferroelectric tunnel junctions with graphene electrodes.
Nat Commun 2014; 5:5518NC

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 × 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.

Authors+Show Affiliations

Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA.Department of Chemistry, University of Lincoln, Nebraska 68588, USA.Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA.Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.1] Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA [2] Kurnakov Institute for General and Inorganic Chemistry, RAS, 119991 Moscow, Russia [3] Faculty of Liberal Arts and Sciences, St Petersburg State University, 190000 St Petersburg, Russia.Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.1] Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA [2] Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA.1] Department of Chemistry, University of Lincoln, Nebraska 68588, USA [2] Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA.1] Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA [2] Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

25417720

Citation

Lu, H, et al. "Ferroelectric Tunnel Junctions With Graphene Electrodes." Nature Communications, vol. 5, 2014, p. 5518.
Lu H, Lipatov A, Ryu S, et al. Ferroelectric tunnel junctions with graphene electrodes. Nat Commun. 2014;5:5518.
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, p. 5518. doi:10.1038/ncomms6518.
Lu H, et al. Ferroelectric Tunnel Junctions With Graphene Electrodes. Nat Commun. 2014 Nov 24;5:5518. PubMed PMID: 25417720.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ferroelectric tunnel junctions with graphene electrodes. AU - Lu,H, AU - Lipatov,A, AU - Ryu,S, AU - Kim,D J, AU - Lee,H, AU - Zhuravlev,M Y, AU - Eom,C B, AU - Tsymbal,E Y, AU - Sinitskii,A, AU - Gruverman,A, Y1 - 2014/11/24/ PY - 2014/09/15/received PY - 2014/10/08/accepted PY - 2014/11/25/entrez PY - 2014/11/25/pubmed PY - 2014/11/25/medline SP - 5518 EP - 5518 JF - Nature communications JO - Nat Commun VL - 5 N2 - 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 × 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. SN - 2041-1723 UR - https://www.unboundmedicine.com/medline/citation/25417720/Ferroelectric_tunnel_junctions_with_graphene_electrodes_ L2 - http://dx.doi.org/10.1038/ncomms6518 DB - PRIME DP - Unbound Medicine ER -