Memristors with diffusive dynamics as synaptic emulators for neuromorphic computing.
The accumulation and extrusion of Ca2+in the pre- and postsynaptic compartments play a critical role in initiating plastic changes in biological synapses. To emulate this fundamental process in electronic devices, we developed diffusive Ag-in-oxide memristors with a temporal response during and after stimulation similar to that of the synaptic Ca2+dynamics. In situ high-resolution transmission electron microscopy and nanoparticle dynamics simulations both demonstrate that Ag atoms disperse under electrical bias and regroup spontaneously under zero bias because of interfacial energy minimization, closely resembling synaptic influx and extrusion of Ca2+, respectively. The diffusive memristor and its dynamics enable a direct emulation of both short- and long-term plasticity of biological synapses, representing an advance in hardware implementation of neuromorphic functionalities.
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Zhongrui
Z
Wang
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Saumil
S
Joshi
Department of Physics, Loughborough University, Loughborough LE11 3TU, UK.
Sergey E
0000-0003-2771-230X
SE
Savel'ev
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Hao
H
Jiang
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Rivu
R
Midya
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Peng
P
Lin
Hewlett Packard Labs, Palo Alto, California 94304, USA.
Miao
M
Hu
Hewlett Packard Labs, Palo Alto, California 94304, USA.
Ning
N
Ge
Hewlett Packard Labs, Palo Alto, California 94304, USA.
John Paul
JP
Strachan
Hewlett Packard Labs, Palo Alto, California 94304, USA.
Zhiyong
Z
Li
Air Force Research Lab, Information Directorate, Rome, New York 13441, USA.
Qing
Q
Wu
Air Force Research Lab, Information Directorate, Rome, New York 13441, USA.
Mark
M
Barnell
Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Geng-Lin
GL
Li
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
Huolin L
0000-0002-6521-868X
HL
Xin
Hewlett Packard Labs, Palo Alto, California 94304, USA.
R Stanley
RS
Williams
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Qiangfei
Q
Xia
Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.
J Joshua
0000-0003-0671-6010
JJ
Yang
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