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arXiv 2404.02571cond-mat.mtrl-sciphysics.comp-ph
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Wenzhou TE:一个基于第一性原理计算的热电材料数据库

Wenzhou TE: a first-principles calculated thermoelectric materials database

Ying Fang, Hezhu Shao

AI总结:

针对热电优值 ZT 难以高通量计算的问题,本文结合 K-means 聚类与第一性原理计算,构建涵盖电输运、形变势及热力性质的 Wenzhou TE 热电材料数据库并提供网页检索。

摘要:

自美国奥巴马政府实施“材料基因组计划”以来,各类计算材料数据库的发展从根本上拓展了材料、能源等行业的选择范围。在热电材料领域,热电优值 ZT 用于量化材料的性能。从对海量材料进行计算的角度来看,由于 ZT 值计算复杂,因而不易获得。本文展示了如何基于材料电子与热输运的第一性原理计算构建热电材料数据库。首先,利用机器学习中的 K-means 聚类算法,根据带隙及其他基本性质的数值对初始结构进行分类,并对具有潜在热电应用价值的窄带隙半导体开展高通量第一性原理计算。当前计算框架主要包括形变势模块、电输运性能模块以及力学与热力学性质模块。我们还为所计算的热电材料数据库建立了搜索网页,可提供材料相关物理性质的搜索与查看功能。本工作或许能够启发更多第一性原理热电材料计算数据库的构建,并加快热电领域的研究进展。

英文摘要:

Since the implementation of the Materials Genome Project by the Obama administration in the United States, the development of various computational materials databases has fundamentally expanded the choices of industries such as materials and energy. In the field of thermoelectric materials, the thermoelectric figure of merit ZT quantifies the performance of the material. From the viewpoint of calculations for vast materials, the ZT values are not easily obtained due to their computational complexity. Here, we show how to build a database of thermoelectric materials based on first-principles calculations for the electronic and heat transport of materials. Firstly, the initial structures are classified according to the values of bandgap and other basic properties using the clustering algorithm K-means in machine learning, and high-throughput first principles calculations are carried out for narrow-bandgap semiconductors which exhibiting potential thermoelectric application. The present framework of calculations mainly includes deformation potential module, electrical transport performance module, mechanical and thermodynamic properties module. We have also set up a search webpage for the calculated database of thermoelectric materials, providing searching and viewing the related physical properties of materials. Our work may inspire the construction of more computational databases of first-principle thermoelectric materials and accelerate research progress in the field of thermoelectrics.

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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