arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.08573cond-mat.mtrl-sci
收藏

数值原子轨道基组内的速度计实时TDDFT

Velocity-gauge real-time TDDFT within a numerical atomic orbital basis set

C. D. Pemmaraju, F. D. Vila, J. J. Kas, S. A. Sato, J. Rehr, K. Yabana, David Prendergast

摘要:

实时含时密度泛函理论(RT-TDDFT)的速度规范形式可以有效地模拟激光场与固体系统的相互作用。本文讨论了在原子轨道线性组合(LCAO)基组框架下,电子动力学的速度规范RT-TDDFT方程的实现。从我们的LCAO实现,电子响应周期性系统的弱和强激光场,得到的数值结果进行比较,从建立的实空间网格和全电位线性增广平面波方法。讨论了基于LCAO的方案在涉及核心电子激发的极紫外和软X射线光谱学中的潜在应用。

英文摘要:

The interaction of laser fields with solid-state systems can be modeled efficiently within the velocity-gauge formalism of real-time time dependent density functional theory (RT-TDDFT). In this article, we discuss the implementation of the velocity-gauge RT-TDDFT equations for electron dynamics within a linear combination of atomic orbitals (LCAO) basis set framework. Numerical results obtained from our LCAO implementation, for the electronic response of periodic systems to both weak and intense laser fields, are compared to those obtained from established real-space grid and Full-Potential Linearized Augumented Planewave approaches. Potential applications of the LCAO based scheme in the context of extreme ultra-violet and soft X-ray spectroscopies involving core-electronic excitations are discussed.

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。

↑