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arXiv 2301.06407cond-mat.mtrl-sci
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迈向高通量多体微扰理论:高效算法与自动化工作流

Towards high-throughput many-body perturbation theory: efficient algorithms and automated workflows

Miki Bonacci, Junfeng Qiao, Nicola Spallanzani, Antimo Marrazzo, Giovanni Pizzi, Elisa Molinari, Daniele Varsano, Andrea Ferretti, Deborah Prezzi

AI总结:

本文提出扩展高通量从头算模拟至多体微扰理论(MBPT)的自动化算法与工作流,包括GW和BSE模拟的高效收敛算法及基于Wannier函数的能带插值方案,并在半导体和金属系统中验证了其高精度与低计算负担。

摘要:

鉴于旨在发现具有所需物理性质的新型材料的高通量(HT)计算筛选,从头算模拟的自动化是必不可少的。在本工作中,我们提出了相关的算法和实现,旨在将这种方法扩展到密度泛函理论(DFT)之外,以实现多体微扰理论(MBPT)计算的自动化。值得注意的是,我们提供了一种新算法,旨在实现GW和BSE模拟的高效且稳健的收敛过程,并在全自动框架中进行了实现。同时,还提出了一种基于最大局域化Wannier函数的自动GW能带插值方案,旨在降低准粒子能带结构的计算负担,同时保持高精度。所提出的开发成果在一组具有代表性的半导体和金属系统上得到了验证。

英文摘要:

The automation of ab initio simulations is essential in view of performing high-throughput (HT) computational screenings oriented to the discovery of novel materials with desired physical properties. In this work, we propose algorithms and implementations that are relevant to extend this approach beyond density functional theory (DFT), in order to automate many-body perturbation theory (MBPT) calculations. Notably, a novel algorithm pursuing the goal of an efficient and robust convergence procedure for GW and BSE simulations is provided, together with its implementation in a fully automated framework. This is accompanied by an automatic GW band interpolation scheme based on maximally-localized Wannier functions, aiming at a reduction of the computational burden of quasiparticle band structures while preserving high accuracy. The proposed developments are validated on a set of representative semiconductor and metallic systems.

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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