title: Analog memory and spike-timing-dependent plasticity characteristics of a nanoscale titanium oxide bilayer resistive switching device.
abstract: We demonstrated analog memory, synaptic plasticity, and a spike-timing-dependent plasticity (STDP) function with a nanoscale titanium oxide bilayer resistive switching device with a simple fabrication process and good yield uniformity. We confirmed the multilevel conductance and analog memory characteristics as well as the uniformity and separated states for the accuracy of conductance change. Finally, STDP and a biological triple model were analyzed to demonstrate the potential of titanium oxide bilayer resistive switching device as synapses in neuromorphic devices. By developing a simple resistive switching device that can emulate a synaptic function, the unique characteristics of synapses in the brain, e.g. combined memory and computing in one synapse and adaptation to the outside environment, were successfully demonstrated in a solid state device.
authors.affiliation: Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, Korea. kyseo@gist.ac.kr
authors.forename: Kyungah
authors.initials: K
authors.lastname: Seo
authors.forename: Insung
authors.initials: I
authors.lastname: Kim
authors.forename: Seungjae
authors.initials: S
authors.lastname: Jung
authors.forename: Minseok
authors.initials: M
authors.lastname: Jo
authors.forename: Sangsu
authors.initials: S
authors.lastname: Park
authors.forename: Jubong
authors.initials: J
authors.lastname: Park
authors.forename: Jungho
authors.initials: J
authors.lastname: Shin
authors.forename: Kuyyadi P
authors.initials: KP
authors.lastname: Biju
authors.forename: Jaemin
authors.initials: J
authors.lastname: Kong
authors.forename: Kwanghee
authors.initials: K
authors.lastname: Lee
authors.forename: Byounghun
authors.initials: B
authors.lastname: Lee
authors.forename: Hyunsang
authors.initials: H
authors.lastname: Hwang
mesh_terms: D000200:Action Potentials / Q000502:physiology*; D032701:Biomimetics / Q000379:methods*; D004553:Electric Conductivity; D008568:Memory; D008954:Models, Biological; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation*; D009473:Neuronal Plasticity / Q000502:physiology*; D010316:Particle Size; D013569:Synapses; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium