Emulating synaptic response in n- and p-channel MoS2 transistors by utilizing charge trapping dynamics.

Scientific Reports
Shubhadeep BhattacharjeePaul K Hurley

Abstract

Brain-inspired, neuromorphic computing aims to address the growing computational complexity and power consumption in modern von-Neumann architectures. Progress in this area has been hindered due to the lack of hardware elements that can mimic neuronal/synaptic behavior which form the fundamental building blocks for spiking neural networks (SNNs). In this work, we leverage the short/long term memory effects due to the electron trapping events in an atomically thin channel transistor that mimic the exchange of neurotransmitters and emulate a synaptic response. Re-doped (n-type) and Nb-doped (p-type) molybdenum di-sulfide (MoS2) field-effect transistors are examined using pulsed-gate measurements, which identify the time scales of electron trapping/de-trapping. The devices demonstrate promising trends for short/long term plasticity in the order of ms/minutes, respectively. Interestingly, pulse paired facilitation (PPF), which quantifies the short-term plasticity, reveal time constants (τ1 = 27.4 ms, τ2 = 725 ms) that closely match those from a biological synapse. Potentiation and depression measurements describe the ability of the synaptic device to traverse several analog states, where at least 50 conductance values are accessed ...Continue Reading

References

Feb 7, 1998·Proceedings of the National Academy of Sciences of the United States of America·L E DobrunzC F Stevens
Feb 5, 2002·Annual Review of Physiology·Robert S Zucker, Wade G Regehr
Aug 31, 2007·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Ami Citri, Robert C Malenka
Feb 5, 2008·IEEE Transactions on Neural Networks·E ChiccaP Del Giudice
May 15, 2012·ACS Nano·Dattatray J LateC N R Rao
Dec 1, 2012·Science·Chris EliasmithDaniel Rasmussen
Sep 4, 2013·Nanotechnology·Duygu KuzumH-S Philip Wong
Apr 30, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Christian Keysers, Valeria Gazzola
Jul 10, 2014·PloS One·Naoki Hiratani, Tomoki Fukai
Jan 29, 2016·Nature·David SilverDemis Hassabis
May 10, 2017·Advanced Materials·Chuan Sen YangYoung Sun
Nov 8, 2019·Nanotechnology·Daniele Ielmini, Stefano Ambrogio

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Methods Mentioned

BETA
atomic force microscopy
electron beam lithography

Software Mentioned

Delta G

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