Self-assembled oxide films with tailored nanoscale ionic and electronic channels for controlled resistive switching
MacManus-Driscoll, Judith L
Nature Publishing Group
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Cho, S., Yun, C., Tappertzhofen, S., Kursumovic, A., Lee, S., Lu, P., Jia, Q., et al. (2016). Self-assembled oxide films with tailored nanoscale ionic and electronic channels for controlled resistive switching. Nature Communications, (12373)https://doi.org/10.1038/ncomms12373
Resistive switches are non-volatile memory cells based on nano-ionic redox processes that offer energy efficient device architectures and open pathways to neuromorphics and cognitive computing. However, channel formation typically requires an irreversible, not well controlled electroforming process, giving difficulty to independently control ionic and electronic properties. The device performance is also limited by the incomplete understanding of the underlying mechanisms. Here, we report a novel memristive model material system based on self-assembled Sm-doped CeO2 and SrTiO3 films that allow the separate tailoring of nanoscale ionic and electronic channels at high density (B1012 inch 2). We systematically show that these devices allow precise engineering of the resistance states, thus enabling large on–off ratios and high reproducibility. The tunable structure presents an ideal platform to explore ionic and electronic mechanisms and we expect a wide potential impact also on other nascent technologies, ranging from ionic gating to micro-solid oxide fuel cells and neuromorphics.
This work was supported by the European Research Council (ERC) (Advanced Investigator grant ERC-2009-AdG-247276-NOVOX) and the Cambridge Commonwealth, European & International Trust. We further acknowledge funding from ERC grant InsituNANO, 279342, (S.T. and S.H.) and the Engineering and Physical Sciences Research Council (EPSRC), EP/P005152/1 (S.H.). Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000. The work at Los Alamos was supported by the U.S. Department of Energy through the LDRD program and performed, in part, at the Center for Integrated Nanotechnologies (CINT), a U.S. Department of Energy, Office of Basic Energy Sciences user facility.
European Research Council (279342)
European Research Council (247276)
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External DOI: https://doi.org/10.1038/ncomms12373
This record's URL: https://www.repository.cam.ac.uk/handle/1810/256908
Attribution 4.0 International, Attribution 4.0 International, Attribution 4.0 International, Attribution 4.0 International
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