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• W3034628464 abstract "The negative differential resistance (NDR) response of Nb/NbOx/Pt cross-point devices is shown to have a polarity dependence due to the effect of the metal/oxide Schottky barriers on the contact resistance. Three distinct responses are observed under opposite polarity testing: bipolar S-type NDR, bipolar snap-back NDR, and combined S-type and snap-back NDR, depending on the stoichiometry of the oxide film and device area. In-situ thermoreflectance imaging is used to show that these NDR responses are associated with strong current localisation, thereby justifying the use of a previously developed two-zone, core shell thermal model of the device. The observed polarity dependent NDR responses, and their dependence on stoichiometry and area are then explained by extending this model to include the effect of the polarity dependent contact resistance. This study provides an improved understanding of the NDR response of metal/oxide/metal structures and informs the engineering of devices for neuromorphic computing and non-volatile memory applications." @default.
• W3034628464 created "2020-06-19" @default.
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• W3034628464 date "2020-06-09" @default.
• W3034628464 modified "2023-09-30" @default.
• W3034628464 title "Schottky-Barrier-Induced Asymmetry in the Negative-Differential-Resistance Response of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Nb</mml:mi><mml:mo>/</mml:mo><mml:msub><mml:mrow><mml:mi>Nb</mml:mi><mml:mi mathvariant=normal>O</mml:mi></mml:mrow><mml:mi>x</mml:mi></mml:msub></mml:math> / <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Pt</mml:mi></mml:math> Cross-Point Devices" @default.
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• W3034628464 doi "https://doi.org/10.1103/physrevapplied.13.064024" @default.
• W3034628464 hasPublicationYear "2020" @default.
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