研究目的
To propose a high-performance numerical scheme for fully coupled electrothermal simulation of electrothermal effects in resistive switching random access memory (RRAM) arrays and investigate the influence of conductive filament (CF) shape on their electrothermal characteristics.
研究成果
The in-house developed simulator demonstrates good performance in convergence and accuracy. The study finds that the maximum temperature and the crosstalk temperature of the RRAM array remain almost unchanged with variations in the major-to-minor axes ratio of the CF, suggesting a cylindrical CF is preferred in real-world applications.
研究不足
The study focuses on the influence of CF shape on electrothermal characteristics but does not explore other potential factors affecting RRAM performance.
1：Experimental Design and Method Selection:
A hybrid finite element-finite volume method (H-FE-FVM) is employed to discretize fully coupled electrothermal equations. A double-level parallel scheme based on JAUMIN and DDM is used for parallel processing.
2：Sample Selection and Data Sources:
The study uses a crossbar array composed of 1D1R cells with specific geometrical parameters.
3：List of Experimental Equipment and Materials:
The simulator is compared with COMSOL Multiphysics for validation.
4：Experimental Procedures and Operational Workflow:
The electrical governing equation is solved first, followed by the calculation of heat generation rate as the thermal source in the thermal conduction equation.
5：Data Analysis Methods:
The performance of the simulator is assessed by comparing its results with COMSOL Multiphysics, and the influence of CF shape on electrothermal characteristics is analyzed.
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