Dual-functional Memory and Threshold Resistive Switching Based on the Push-Pull Mechanism of Oxygen Ions
Type
ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
KAUST Solar Center (KSC)
Date
2016-04-07Online Publication Date
2016-04-07Print Publication Date
2016-07Permanent link to this record
http://hdl.handle.net/10754/604979
Metadata
Show full item recordAbstract
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 ReportsSponsors
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 NatureJournal
Scientific ReportsPubMed ID
27052322Additional Links
http://www.nature.com/articles/srep23945ae974a485f413a2113503eed53cd6c53
10.1038/srep23945
Scopus Count
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