Gold nanogap-based artificial synapses

The basic building blocks for brain-inspired computing are neurons and their inter-cellular connections, called synapses. In this paper, we report artificial synapses composed of simple gold (Au) nanogaps that function using an electromigration-based method called "activation." In the acti...

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Bibliographic Details
Published in:	Japanese Journal of Applied Physics Vol. 59; no. 5; pp. 50601 - 50606
Main Authors:	Sakai, Keita, Sato, Tomomi, Kiyokawa, Riku, Koyama, Ryoya, Yagi, Mamiko, Ito, Mitsuki, Shirakashi, Jun-ichi
Format:	Journal Article
Language:	English
Published:	Tokyo IOP Publishing 01-05-2020 Japanese Journal of Applied Physics
Subjects:	Activation artificial synapse Electromigration Field emission Gold long-term depression long-term potentiation nanogap spike-timing-dependent plasticity Synapses
Online Access:	Get full text
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Summary:	The basic building blocks for brain-inspired computing are neurons and their inter-cellular connections, called synapses. In this paper, we report artificial synapses composed of simple gold (Au) nanogaps that function using an electromigration-based method called "activation." In the activation technique, metal-atom transport is induced by a field emission current, resulting in a change in gap separation. Synaptic functionalities, including long-term potentiation, long-term depression, and spike-timing-dependent plasticity, were successfully implemented in the electromigrated Au nanogaps using activation. Furthermore, the integration of four artificial synapses in a 2 × 2 array and image memorization were achieved with the Au nanogap-based artificial synapses. These results illustrate that electromigrated Au nanogaps hold promise as synaptic devices for bio-inspired computational systems.
Bibliography:	JJAP-102133.R3
ISSN:	0021-4922 1347-4065
DOI:	10.35848/1347-4065/ab8168