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    Dual-functional Memory and Threshold Resistive Switching Based on the Push-Pull Mechanism of Oxygen Ions

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    Type
    Article
    Authors
    Huang, Yi-Jen
    Chao, Shih-Chun
    Lien, Der-Hsien cc
    Wen, Cheng-Yen
    He, Jr-Hau cc
    Lee, Si-Chen
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Solar Center (KSC)
    Date
    2016-04-07
    Online Publication Date
    2016-04-07
    Print Publication Date
    2016-07
    Permanent link to this record
    http://hdl.handle.net/10754/604979
    
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    Abstract
    The combination of nonvolatile memory switching and volatile threshold switching functions of transition metal oxides in crossbar memory arrays is of great potential for replacing charge-based flash memory in very-large-scale integration. Here, we show that the resistive switching material structure, (amorphous TiOx)/(Ag nanoparticles)/(polycrystalline TiOx), fabricated on the textured-FTO substrate with ITO as the top electrode exhibits both the memory switching and threshold switching functions. When the device is used for resistive switching, it is forming-free for resistive memory applications with low operation voltage (<±1 V) and self-compliance to current up to 50 μA. When it is used for threshold switching, the low threshold current is beneficial for improving the device selectivity. The variation of oxygen distribution measured by energy dispersive X-ray spectroscopy and scanning transmission electron microscopy indicates the formation or rupture of conducting filaments in the device at different resistance states. It is therefore suggested that the push and pull actions of oxygen ions in the amorphous TiOx and polycrystalline TiOx films during the voltage sweep account for the memory switching and threshold switching properties in the device.
    Citation
    Dual-functional Memory and Threshold Resistive Switching Based on the Push-Pull Mechanism of Oxygen Ions 2016, 6:23945 Scientific Reports
    Sponsors
    The authors would like to thank the Ministry of Science and Technology in Taiwan for financially supporting this research under Contract No. MOST 103-2622-E-002-031 and NSC 100-2112-M-002-019.
    Publisher
    Springer Nature
    Journal
    Scientific Reports
    DOI
    10.1038/srep23945
    PubMed ID
    27052322
    Additional Links
    http://www.nature.com/articles/srep23945
    ae974a485f413a2113503eed53cd6c53
    10.1038/srep23945
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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