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arXiv 2012.09314cond-mat.mtrl-scics.LG
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使用深度学习生成模型计算发现新的2D材料

Computational discovery of new 2D materials using deep learning generative models

University of South Carolina(南卡罗来纳大学)

Yuqi Song, Edirisuriya M. Dilanga Siriwardane, Yong Zhao, Jianjun Hu

摘要:

二维材料由于其独特的光电性能,在半导体、光电子等领域有着广泛的应用前景。虽然在现有的材料数据库中已经筛选了数千种二维材料,但发现新的二维材料仍然具有挑战性。在这里,我们提出了一种深度学习生成模型,用于组合生成,并结合基于随机森林的2D材料分类器来发现新的假设2D材料。此外,基于模板的元素替代结构预测方法被开发来预测新预测的假设公式的子集的晶体结构,这允许我们使用DFT计算来确认它们的结构稳定性。到目前为止,我们已经发现了267,489种新的潜在二维材料成分,并通过DFT形成能计算确认了12种二维/层状材料。我们的研究结果表明,生成式机器学习模型为探索新的2D材料发现的巨大化学设计空间提供了一种有效的方法。

英文摘要:

Two dimensional (2D) materials have emerged as promising functional materials with many applications such as semiconductors and photovoltaics because of their unique optoelectronic properties. While several thousand 2D materials have been screened in existing materials databases, discovering new 2D materials remains to be challenging. Herein we propose a deep learning generative model for composition generation combined with random forest based 2D materials classifier to discover new hypothetical 2D materials. Furthermore, a template based element substitution structure prediction approach is developed to predict the crystal structures of a subset of the newly predicted hypothetical formulas, which allows us to confirm their structure stability using DFT calculations. So far, we have discovered 267,489 new potential 2D materials compositions and confirmed twelve 2D/layered materials by DFT formation energy calculation. Our results show that generative machine learning models provide an effective way to explore the vast chemical design space for new 2D materials discovery.

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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