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Mechanism of the resistivity switching induced by the joule heating in crystalline NbO2
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Olin, Samuel W., Razek, S. Abdel, Piper, Louis F. J. and Lee, Wei‐Cheng (2022) Mechanism of the resistivity switching induced by the joule heating in crystalline NbO2. Advanced Quantum Technologies, 5 (11). 2200067. doi:10.1002/qute.202200067 ISSN 2511-9044.
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Official URL: http://dx.doi.org/10.1002/qute.202200067
Abstract
Recently, the memristive electrical transport properties in NbO2 have attracted much attention for their promising application to neuromorphic computation. At the center of debate is whether the metal-to-insulator transition (MIT) originates from the structural distortion (Peierls) or the electron correlation (Mott). With inputs from experiments and first principles calculations, a thermodynamical model is developed rooted in the scenario of the MIT driven by a 2nd order Peierls instability. It is found that the temperature dependence of the electrical conductivity can be accurately fit by the band gap varying with temperature due to the gradual weakening of the Nb-Nb dimers. The resistivity switching can consequently be understood by dimer-free metallic domains induced by local Joule heating. In solving the heat equation, it is found that the steady state cannot be reached if the applied voltage exceeds a threshold, resulting in the chaotic behavior observed in the high voltage and current states. With the Ginzburg–Landau theory and the Joule heating equation, the evolution of the metallic domains under bias voltage can be simulated and directly verified by experiments.
Item Type: | Journal Article | |||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
Library of Congress Subject Headings (LCSH): | Memristors, Nanostructured materials -- Electric properties, Heat -- Transmission, Mass transfer | |||||||||
Journal or Publication Title: | Advanced Quantum Technologies | |||||||||
Publisher: | Wiley - V C H Verlag GmbH & Co. KGaA | |||||||||
ISSN: | 2511-9044 | |||||||||
Official Date: | November 2022 | |||||||||
Dates: |
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Volume: | 5 | |||||||||
Number: | 11 | |||||||||
Number of Pages: | 9 | |||||||||
Article Number: | 2200067 | |||||||||
DOI: | 10.1002/qute.202200067 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Reuse Statement (publisher, data, author rights): | This is the peer reviewed version of the following article: Olin, S. W., Razek, S. A., Piper, L. F. J., Lee, W.-C., Mechanism of the Resistivity Switching Induced by the Joule Heating in Crystalline NbO2. Adv Quantum Technol. 2022, 2200067., which has been published in final form at https://doi.org/10.1002/qute.202200067. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Copyright Holders: | Wiley-VCH GmbH | |||||||||
Date of first compliant deposit: | 4 November 2022 | |||||||||
RIOXX Funder/Project Grant: |
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Open Access Version: |
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