arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.01205cond-mat.mtrl-sci
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基于高通量密度泛函理论的Wannier紧束缚哈密顿量数据库

Database of Wannier Tight-binding Hamiltonians using High-throughput Density Functional Theory

Kevin F. Garrity, Kamal Choudhary

摘要:

我们开发了一个计算工作流程,用于基于密度泛函理论(DFT)的电子能带结构计算的高通量Wannierization。我们将此工作流程应用于1771种材料,并创建了一个数据库,其中包含基于Wannier函数的紧束缚哈密顿量(WTBH)。我们通过比较Wannier能带结构和直接计算的DFT能带结构来评估WTBH的准确性,所述DFT在Wannier化中使用的k点集以及来自高对称线的独立k点上进行。精确的WTBH可用于计算许多材料的性能,我们包括一些示例应用程序。我们还开发了一个网络应用程序,可以用来预测电子性能的飞行使用WTBH从我们的数据库。生成哈密顿量的工具和WTB参数的数据库将通过网站https://github.com/usnistgov/jarvis和https://www.ctcms.nist.gov/jarviswtb公开提供。

英文摘要:

We develop a computational workflow for high-throughput Wannierization of density functional theory (DFT) based electronic band structure calculations. We apply this workflow to 1771 materials, and we create a database with the resulting Wannier-function based tight binding Hamiltonians (WTBH). We evaluate the accuracy of the WTBHs by comparing the Wannier band structures to directly calculated DFT band structures on both the set of k-points used in the Wannierization as well as independent k-points from high symmetry lines. Accurate WTBH can be used for the calculation of many materials properties, and we include a few example applications. We also develop a web-app that can be used to predict electronic properties on-the-fly using WTBH from our database. The tools to generate the Hamiltonian and the database of the WTB parameters will be made publicly available through the websites https://github.com/usnistgov/jarvis and https://www.ctcms.nist.gov/jarviswtb.

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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