Calculating optical absorption spectra for large systems using linear-scaling density functional theory

Calculating optical absorption spectra for large systems using linear-scaling density functional theory
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使用线性尺度密度泛函理论计算大型系统的光学吸收光谱

DOI:
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
P. Haynes
P. Haynes
中科院分区:
--
文献类型:
--
作者:
L. Ratcliff;N. Hine;P. Haynes

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提出了一种基于线性标度密度泛函理论(LS-DFT)计算光吸收谱的新方法,该方法结合了优化一组局域轨道以精确表示未占据的Kohn-Sham态的方案。三种不同的方案进行比较,其中最有前途的,基于使用的投影算子,已实现在一个功能齐全的LS-DFT代码。该方法已应用于无金属酞菁分子和共轭聚合物聚对苯撑的吸收光谱的计算。从传统的DFT码的结果得到了很好的协议。
A new method for calculating optical absorption spectra within linear-scaling density functional theory (LS-DFT) is presented, incorporating a scheme for optimizing a set of localized orbitals to accurately represent unoccupied Kohn-Sham states. Three different schemes are compared and the most promising of these, based on the use of a projection operator, has been implemented in a fully functional LS-DFT code. The method has been applied to the calculation of optical absorption spectra for the metal-free phthalocyanine molecule and the conjugated polymer poly(para-phenylene). Excellent agreement with results from a traditional DFT code is obtained.
使用分层稀疏矩阵代数对 Al2O3 中的带电点缺陷进行线性缩放密度泛函模拟。
DOI: 10.1063/1.3492379
发表时间: 2010
期刊: The Journal of chemical physics
影响因子: --
作者:
Hine ND
通讯作者: Hine ND
DOI: 10.1103/physrevb.83.195102
发表时间: 2011-05-02
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Hine, Nicholas D. M.;Robinson, Mark;Mostofi, Arash A.
通讯作者: Mostofi, Arash A.