AUTHOR=Xin Xing , Sun Liyao , Chen Jiamei , Bao Youzhe , Tao Ye , Lin Ya , Bian Jingyao , Wang Zhongqiang , Zhao Xiaoning , Xu Haiyang , Liu Yichun 

TITLE=Real-time numerical system convertor via two-dimensional WS2-based memristive device

JOURNAL=Frontiers in Computational Neuroscience

VOLUME=16

YEAR=2022

URL=https://www.frontiersin.org/journals/computational-neuroscience/articles/10.3389/fncom.2022.1015945

DOI=10.3389/fncom.2022.1015945

ISSN=1662-5188

ABSTRACT=<p>The intriguing properties of two-dimensional (2D) transition metal dichalcogenides (TMDCs) enable the exploration of new electronic device architectures, particularly the emerging memristive devices for in-memory computing applications. Implementation of arithmetic logic operations taking advantage of the non-linear characteristics of memristor can significantly improve the energy efficiency and simplify the complexity of peripheral circuits. Herein, we demonstrate an arithmetic logic unit function using a lateral volatile memristor based on layered 2D tungsten disulfide (WS<sub>2</sub>) materials and some combinational logic circuits. Removable oxygen ions were introduced into WS<sub>2</sub> materials through oxygen plasma treatment process. The resistive switching of the memristive device caused by the thermophoresis-assisted oxygen ions migration has also been revealed. Based on the characteristics of excitatory postsynaptic current (EPSC), paired-pulse facilitation (PPF), and spike rate dependent plasticity (SRDP), a real-time numerical system convertor was successfully accomplished, which is a significant computing function of arithmetic logic unit. This work paves a new way for developing 2D memristive devices for future arithmetic logic applications.</p>