Synaptic Properties of an Interfacial Memristor Based on a Ga2O3/Nb:SrTiO3 Heterojunction

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2024-10-31 DOI:10.1021/acs.jpclett.4c0254810.1021/acs.jpclett.4c02548

Youhong Wang, Wei Hu*, Kaijin Kang, Caili Dong and Xiaosheng Tang*,

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引用次数: 0

Abstract

Memristors have been extensively studied for tremendous potential for future neuromorphic computing hardware applications because of their ability to imitate biological synaptic processes. Herein, we report an interfacial memristor based on a Ga₂O₃/Nb:SrTiO₃ heterojunction that shows stable bipolar resistive switching behavior, long retention time, and high switching ratio. The conductance of the Au/Ga₂O₃/Nb:SrTiO₃/In memristor can be gradually modulated under the voltage sweep mode as well as positive and negative pulse voltage stimulations, respectively, thus realizing the long-term potentiation/depression characteristics of the simulated biological synapse. A neural network based on the prepared memristor was built to recognize the handwritten picture data set with a recognition accuracy of 92.78% by using the NeuroSimV3.0 platform. Our work indicates that the Ga₂O₃/Nb:SrTiO₃ heterojunction memristor has significant potential in a neuromorphic computing system.

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基于 Ga2O3/Nb:SrTiO3 异质结的界面记忆晶体管的突触特性

忆阻器具有模仿生物突触过程的能力，因此在未来神经形态计算硬件应用中具有巨大潜力，已被广泛研究。在此，我们报告了一种基于 Ga2O3/Nb:SrTiO3 异质结的界面忆阻器，它具有稳定的双极电阻开关行为、较长的保持时间和较高的开关比。Au/Ga2O3/Nb:SrTiO3/In Memristor 的电导率可分别在电压扫描模式和正负脉冲电压刺激下逐渐调制，从而实现模拟生物突触的长期增效/抑制特性。利用 NeuroSimV3.0 平台，构建了基于所制备的忆阻器的神经网络，用于识别手写图片数据集，识别准确率达到 92.78%。我们的工作表明，Ga2O3/Nb:SrTiO3异质结忆阻器在神经形态计算系统中具有巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.