Deswal, Sweety and Kumar, Ashok and Kumar, Ajeet (2018) Investigating unipolar switching in Niobium oxide resistive switches: Correlating quantized conductance and mechanism. AIP Advances, 8 (8). 085014-085020. ISSN 2158-3226
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Abstract
Memory devices based on resistive switching (RS) have not been fully realised due to lack of understanding of the underlying switching mechanisms. Nature of ion transport responsible for switching and growth of conducting filament in transition metal oxide based RS devices is still in debate. Here, we investigated the mechanism in Niobium oxide based RS devices, which shows unipolar switching with high ON/OFF ratio, good endurance cycles and high retention times. We controlled the boundary conditions between low-conductance insulating and a high-conductance metallic state where conducting filament (CF) can form atomic point contact and exhibit quantized conductance behaviour. Based on the statistics generated from quantized steps data, we demonstrated that the CF is growing atom by atom with the applied voltage sweeps. We also observed stable quantized states, which can be utilized in multistate switching
| Item Type: | Article |
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| Additional Information: | Copyright for this article belongs to M/s American Institute of Physics. |
| Subjects: | Materials Science Applied Physics/Condensed Matter Nanoscience/ Nanotechnology |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. Yogesh Joshi |
| Date Deposited: | 20 Nov 2019 11:51 |
| Last Modified: | 20 Nov 2019 11:51 |
| URI: | http://npl.csircentral.net/id/eprint/3918 |
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