Neuromorphic nanocluster networks:Critical role of the substrate in nano-link formation  

作　　者：Wenkai Wu Alexey V.Verkhovtsev Theodoros Pavloudis Andrey V.Solov’yov Richard E.Palmer 

机构地区：[1]Nanomaterials Lab,Faculty of Science and Engineering,Swansea University,Bay Campus,Fabian Way,SA18EN,Swansea,UK [2]MBN Research Center,Altenhöferallee 3,60438 Frankfurt am Main,Germany [3]School of Physics,Faculty of Sciences,Aristotle University of Thessaloniki,GR-54124 Thessaloniki,Greece

出　　处：《Nano Research》2023年第7期10500-10506,共7页纳米研究（英文版）

基　　金：The authors are grateful for partial financial support by the European Commission through the RADON project(GA 872494)within the H2020-MSCA-RISE-2019 call;This article is also based upon work from the COST Action CA20129 MultIChem,supported by COST(European Cooperation in Science and Technology);TP acknowledges Swansea University support via project 74143 of the Research Committee of Aristotle University of Thessaloniki;This work was also supported in part by Deutsche Forschungsgemeinschaft(Project no.415716638).The authors acknowledge the computational support by the Goethe-HLR cluster of the Frankfurt Center for Scientific Computing and by the Supercomputing Wales project,which is part-funded by the European Regional Development Fund(ERDF)via the Welsh Government.

摘　　要：Atomic cluster-based networks represent a promising architecture for the realization of neuromorphic computing systems,which may overcome some of the limitations of the current computing paradigm.The formation and breakage of links between the clusters are of utmost importance for the functioning of these computing systems.This paper reports the results of molecular dynamics simulations of synapse(bridge)formation at elevated temperature and thermal breaking processes between 2.8 nmsized Au1415 clusters deposited on a carbon substrate,a model system.Crucially,we find that the bridge formation process is driven by the diffusion of gold atoms along the substrate,no matter how small the gap between the clusters themselves.The complementary simulations of the bridge breaking process reveal the existence of a threshold bias voltage to activate bridge rupture via Joule heating.These results provide an atomistic-level understanding of the fundamental dynamical processes occurring in neuromorphic cluster arrays.

关 键 词：atomic-switch network NANOCLUSTERS nanoparticles(NPs) clusters on surfaces SYNAPSE neuromorphics molecular dynamics(MD) 

分 类 号：TB383[一般工业技术—材料科学与工程]