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评估最近的泛函密度函数在描述碱金属、碱土金属和过渡金属的晶格常数、体弹性模量和内聚能方面的性能。

Assessing the performance of the recent meta-GGA density functionals for describing the lattice constants, bulk moduli, and cohesive energies of alkali, alkaline-earth, and transition metals.

机构信息

School of Physical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India.

School of Physics, Indian Institute of Science Education and Research, Maruthamala, Vithura, Thiruvananthapuram 695551, India.

出版信息

J Chem Phys. 2018 Oct 28;149(16):164703. doi: 10.1063/1.5047863.

Abstract

The bulk properties such as lattice constants, bulk moduli, and cohesive energies of alkali, alkaline-earth, and transition metals are studied within the framework of the recently developed meta-GGA (meta-Generalized Gradient Approximation) level semilocal exchange-correlation functionals. To establish the applicability, broadness, and accuracy of meta-GGA functionals, we also put the results obtained using PBE (Perdew-Burke-Ernzerhof) [J. P. Perdew , Phys. Rev. Lett. , 3865 (1996)] and PBE reparameterized for solid [J. P. Perdew , Phys. Rev. Lett. , 136406 (2008)] GGA functionals. The interesting feature of the present paper is that it measures the accuracy of the recently developed TM (Tao-Mo), TMTPSS [TM exchange with Tao-Perdew-Staroverov-Scuseria (TPSS)] [J. Tao and Y. Mo, Phys. Rev. Lett. , 073001 (2016)] correlation, and strongly constrained and appropriately normed [J. Sun , Phys. Rev. Lett. , 036402 (2015)] functionals to calculate the aforementioned properties. Not only that, we also include other (popular) meta-GGA functionals in order to have a closer look at the performance of the meta-GGA functionals too. The present systematic investigation shows that the TM functional is accurate in describing the lattice constants while for cohesive energies and bulk moduli, the PBE and modified TPSS perform better compared to others.

摘要

碱金属、碱土金属和过渡金属的体性质,如晶格常数、体弹性模量和内聚能,是在最近开发的meta-GGA(meta-广义梯度近似)级半局域交换相关泛函的框架内研究的。为了确立meta-GGA 泛函的适用性、广泛性和准确性,我们还将使用 PBE(Perdew-Burke-Ernzerhof)[J. P. Perdew, Phys. Rev. Lett. 3865 (1996)]和 PBE 重新参数化的固体[J. P. Perdew, Phys. Rev. Lett. 136406 (2008)]GGA 泛函得到的结果。本文的一个有趣特点是,它衡量了最近开发的 TM(Tao-Mo)、TMTPSS [TM 与 Tao-Perdew-Staroverov-Scuseria(TPSS)交换] [J. Tao 和 Y. Mo, Phys. Rev. Lett. 073001 (2016)]相关和强烈约束和适当标准化[J. Sun, Phys. Rev. Lett. 036402 (2015)]泛函计算上述性质的准确性。不仅如此,我们还包括其他(流行)meta-GGA 泛函,以便更仔细地观察 meta-GGA 泛函的性能。目前的系统研究表明,TM 泛函在描述晶格常数方面是准确的,而对于内聚能和体弹性模量,PBE 和修改后的 TPSS 与其他泛函相比表现更好。

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