title: Synaptic plasticity and memory functions achieved in a WO3-x-based nanoionics device by using the principle of atomic switch operation.
abstract: A compact neuromorphic nanodevice with inherent learning and memory properties emulating those of biological synapses is the key to developing artificial neural networks rivaling their biological counterparts. Experimental results showed that memorization with a wide time scale from volatile to permanent can be achieved in a WO3-x-based nanoionics device and can be precisely and cumulatively controlled by adjusting the device's resistance state and input pulse parameters such as the amplitude, interval, and number. This control is analogous to biological synaptic plasticity including short-term plasticity, long-term potentiation, transition from short-term memory to long-term memory, forgetting processes for short- and long-term memory, learning speed, and learning history. A compact WO3-x-based nanoionics device with a simple stacked layer structure should thus be a promising candidate for use as an inorganic synapse in artificial neural networks due to its striking resemblance to the biological synapse.
authors.affiliation: International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, Japan. YANG.Rui@nims.go.jp
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.forename: Kazuya
authors.initials: K
authors.lastname: Terabe
authors.forename: Yiping
authors.initials: Y
authors.lastname: Yao
authors.forename: Tohru
authors.initials: T
authors.lastname: Tsuruoka
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Hasegawa
authors.forename: James K
authors.initials: JK
authors.lastname: Gimzewski
authors.forename: Masakazu
authors.initials: M
authors.lastname: Aono
mesh_terms: D004583:Electrons; D008959:Models, Neurological; D036103:Nanotechnology / Q000295:instrumentation*; D016571:Neural Networks, Computer; D009473:Neuronal Plasticity; D010087:Oxides / Q000737:chemistry; D013569:Synapses; D014414:Tungsten / Q000737:chemistry
chemical_list: D010087:Oxides; C511604:tungsten oxide; D014414:Tungsten