Classification and structural characteristics of amorphous materials based on interpretable deep learning
Jiamei Cui(崔佳梅)1, Yunjie Li(李韵洁)1, Cai Zhao(赵偲)1, and Wen Zheng(郑文)1,2,†
1 Institute of Public Safety and Big Data, College of Data Science, Taiyuan University of Technology, Jinzhong 030600, China; 2 Shanxi Engineering Research Center for Intelligent Data Assisted Treatment, Changzhi Medical College, Changzhi 046000, China
Abstract Defining the structure characteristics of amorphous materials is one of the fundamental problems that need to be solved urgently in complex materials because of their complex structure and long-range disorder. In this study, we develop an interpretable deep learning model capable of accurately classifying amorphous configurations and characterizing their structural properties. The results demonstrate that the multi-dimensional hybrid convolutional neural network can classify the two-dimensional (2D) liquids and amorphous solids of molecular dynamics simulation. The classification process does not make a priori assumptions on the amorphous particle environment, and the accuracy is 92.75%, which is better than other convolutional neural networks. Moreover, our model utilizes the gradient-weighted activation-like mapping method, which generates activation-like heat maps that can precisely identify important structures in the amorphous configuration maps. We obtain an order parameter from the heatmap and conduct finite scale analysis of this parameter. Our findings demonstrate that the order parameter effectively captures the amorphous phase transition process across various systems. These results hold significant scientific implications for the study of amorphous structural characteristics via deep learning.
Fund: Project supported by National Natural Science Foundation of China (Grant No. 11702289), the Key Core Technology and Generic Technology Research and Development Project of Shanxi Province, China (Grant No. 2020XXX013), and the National Key Research and Development Project of China.
Jiamei Cui(崔佳梅), Yunjie Li(李韵洁), Cai Zhao(赵偲), and Wen Zheng(郑文) Classification and structural characteristics of amorphous materials based on interpretable deep learning 2023 Chin. Phys. B 32 096101
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