arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.03331cond-mat.mtrl-sci
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图深度学习加速了高效的晶体结构搜索和特征提取

Graph deep learning accelerated efficient crystal structure search and feature extraction

Chuannan Li, Hanpu Liang, Xie Zhang, Zijing Lin, Su-Huai Wei

摘要:

结构搜索和特征提取是现代材料设计中的一个中心课题,其效率目前是有限的,但可以通过机器学习(ML)来提高。在这里,我们开发了一个基于ML的预测分析框架,其中包括一个基于遗传算法的组合晶体优化程序(SCCOP)和一个功能添加剂属性模型,以显着降低计算成本,并提取属性相关的结构特征。我们的方法具有高度的准确性和预测性,并从所需的结构中提取结构特征来指导材料设计。作为一个案例研究,我们将我们的新方法应用于二维B-C-N系统,该系统从82种组合物中识别出28种以前未发现的稳定结构;我们的分析进一步确定了对能量和带隙贡献最大的结构特征。与传统方法相比,SCCOP在保持相当精度的同时,速度约为10倍。我们的新框架通常适用于所有类型的系统,用于精确和高效的结构搜索,为ML提取的结构特征和物理性质之间的关系提供了新的见解。

英文摘要:

Structural search and feature extraction are a central subject in modern materials design, the efficiency of which is currently limited, but can be potentially boosted by machine learning (ML). Here, we develop an ML-based prediction-analysis framework, which includes a symmetry-based combinatorial crystal optimization program (SCCOP) and a feature additive attribution model, to significantly reduce computational costs and to extract property-related structural features. Our method is highly accurate and predictive, and extracts structural features from desired structures to guide materials design. As a case study, we apply our new approach to a two-dimensional B-C-N system, which identifies 28 previously undiscovered stable structures out of 82 compositions; our analysis further establishes the structural features that contribute most to energy and bandgap. Compared to conventional approaches, SCCOP is about 10 times faster while maintaining a comparable accuracy. Our new framework is generally applicable to all types of systems for precise and efficient structural search, providing new insights into the relationship between ML-extracted structural features and physical properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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