Fast Spiking of a Mott VO-Carbon Nanotube Composite Device.

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ID: 20561
2019
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Abstract
The recent surge of interest in brain-inspired computing and power-efficient electronics has dramatically bolstered development of computation and communication using neuron-like spiking signals. Devices that can produce rapid and energy-efficient spiking could significantly advance these applications. Here we demonstrate direct current or voltage-driven periodic spiking with sub-20 ns pulse widths from a single device composed of a thin VO film with a metallic carbon nanotube as a nanoscale heater, without using an external capacitor. Compared with VO-only devices, adding the nanotube heater dramatically decreases the transient duration and pulse energy, and increases the spiking frequency, by up to 3 orders of magnitude. This is caused by heating and cooling of the VO across its insulator-metal transition being localized to a nanoscale conduction channel in an otherwise bulk medium. This result provides an important component of energy-efficient neuromorphic computing systems and a lithography-free technique for energy-scaling of electronic devices that operate via bulk mechanisms.
Reference Key
bohaichuk2019fastnano Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bohaichuk, Stephanie M;Kumar, Suhas;Pitner, Greg;McClellan, Connor J;Jeong, Jaewoo;Samant, Mahesh G;Wong, H-S Philip;Parkin, Stuart S P;Williams, R Stanley;Pop, Eric;
Journal Nano letters
Year 2019
DOI
10.1021/acs.nanolett.9b01554
URL
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