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arXiv 1406.3259cond-mat.str-elcond-mat.mtrl-sci
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DFT +U的拟杂化Hubbard密度泛函

Reformulation of DFT+U as a pseudo-hybrid Hubbard density functional

Luis A. Agapito, Stefano Curtarolo, Marco Buongiorno Nardelli

摘要:

以较低的计算费用准确预测材料的电子性质是发展有效的高通量量子力学(HTQM)框架以加速材料发现的必要条件。HTQM基础设施依赖于密度泛函理论(DFT)的预测能力,这是材料性能第一性原理研究的首选方法。然而,DFT的近似导致半导体和绝缘体的电子能带结构的描述有些不准确。在这篇文章中,我们介绍ACBN 0,一个伪混合哈伯德密度泛函,产生一个改进的预测的能带结构的绝缘体,如过渡金属氧化物,如TiO 2,MnO,NiO和ZnO,只有一个微不足道的增加计算成本。

英文摘要:

The accurate prediction of the electronic properties of materials at a low computational expense is a necessary conditions for the development of effective high-throughput quantum-mechanics (HTQM) frameworks for accelerated materials discovery. HTQM infrastructures rely on the predictive capability of Density Functional Theory (DFT), the method of choice for the first principles study of materials properties. However, DFT suffers of approximations that result in a somewhat inaccurate description of the electronic band structure of semiconductors and insulators. In this article we introduce ACBN0, a pseudo-hybrid Hubbard density functional that yields an improved prediction of the band structure of insulators such as transition-metal oxides, as shown for TiO2, MnO, NiO and ZnO, with only a negligible increase in computational cost.

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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