Interface‐Modulated Resistive Switching in Mo‐Irradiated ReS<sub>2</sub> for Neuromorphic Computing
Mei Er Pam, Sifan Li, Tong Su, Yu‐Chieh Chien, Yesheng Li, Yee Sin Ang, Kah‐Wee Ang
Abstract
Abstract Coupling charge impurity scattering effects and charge‐carrier modulation by doping can offer intriguing opportunities for atomic‐level control of resistive switching (RS). Nonetheless, such effects have remained unexplored for memristive applications based on 2D materials. Here a facile approach is reported to transform an RS‐inactive rhenium disulfide (ReS 2 ) into an effective switching material through interfacial modulation induced by molybdenum‐irradiation (Mo‐i) doping. Using ReS 2 as a model system, this study unveils a unique RS mechanism based on the formation/dissolution of metallic β‐ReO 2 filament across the defective ReS 2 interface during the set/reset process. Through simple interfacial modulation, ReS 2 of various thicknesses are switchable by modulating the Mo‐irradiation period. Besides, the Mo‐irradiated ReS 2 (Mo‐ReS 2 ) memristor further exhibits a bipolar non‐volatile switching ratio of nearly two orders of magnitude, programmable multilevel resistance states, and long‐term synaptic plasticity. Additionally, the fabricated device can achieve a high MNIST learning accuracy of 91% under a non‐identical pulse train. The study's findings demonstrate the potential for modulating RS in RS‐inactive 2D materials via the unique doping‐induced charged impurity scattering property.