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Electrical Switching in Semiconductor-Metal Self-Assembled VO2 Disordered Metamaterial Coatings

Channam, Venkat Sunil Kumar and Maury, Francis and Bahlawane, Naoufal Electrical Switching in Semiconductor-Metal Self-Assembled VO2 Disordered Metamaterial Coatings. (2016) Scientific Reports, 6. 37699.

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Official URL: http://dx.doi.org/10.1038/srep37699


As a strongly correlated metal oxide, VO2 inspires several highly technological applications. The challenging reliable wafer-scale synthesis of high quality polycrystalline VO2 coatings is demonstrated on 4” Si taking advantage of the oxidative sintering of chemically vapor deposited VO2 films. This approach results in films with a semiconductor-metal transition (SMT) quality approaching that of the epitaxial counterpart. SMT occurs with an abrupt electrical resistivity change exceeding three orders of magnitude with a narrow hysteresis width. Spatially resolved infrared and Raman analyses evidence the self-assembly of VO2 disordered metamaterial, compresing monoclinic (M1 and M2) and rutile (R)domains, at the transition temperature region. The M2 mediation of the M1-R transition is spatially confined and related to the localized strain-stabilization of the M2 phase. The presence of the M2 phase is supposed to play a role as a minor semiconducting phase far above the SMT temperature. In terms of application, we show that the VO2 disordered self-assembly of M and R phases is highly stable and can be thermally triggered with high precision using short heating or cooling pulses with adjusted strengths. Such a control enables an accurate and tunable thermal control of the electrical switching.

Item Type:Article
Additional Information:Thanks to Nature Publishing Group. The definitive version is available at http://www.nature.com/
HAL Id:hal-01419482
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Luxembourg Institute of Science and Technology - LIST (LUXEMBOURG)
Laboratory name:
Deposited On:19 Dec 2016 11:25

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