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arXiv 1407.5124cond-mat.str-el
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选择局部化Wannier函数

Selectively Localized Wannier Functions

Runzhi Wang, Emanuel A. Lazar, Hyowon Park, Andrew J. Millis, Chris A. Marianetti

摘要:

自Marzari和Vanderbilt的开创性工作以来,最大局域化的Wannier函数已被广泛用作周期性材料电子结构的实空间表示。在本文中,我们引入选择性本地化的Wannier函数,扩展了方法的Marzari和Vanderbilt在两个重要方面。首先,我们的方法允许我们专注于定位感兴趣的轨道的子集。其次,我们的方法允许我们固定这些轨道的中心,并确保点群对称性的保持。这些特点是很重要的,当Wannier函数的方法,超越了密度泛函理论更有效地治疗局部子空间的哈密顿量。应用我们的方法GaAs,SrMnO $_3$,和Co表明,选择性本地化的Wannier函数可以提供最大本地化的Wannier函数技术的改进。

英文摘要:

Since the seminal work of Marzari and Vanderbilt, maximally localized Wannier functions have become widely used as a real-space representation of the electronic structure of periodic materials. In this paper we introduce selectively localized Wannier functions which extend the method of Marzari and Vanderbilt in two important ways. First, our method allows us to focus on localizing a subset of orbitals of interest. Second, our method allows us to fix centers of these orbitals, and ensure the preservation of the point-group symmetry. These characteristics are important when Wannier functions are used in methodologies that go beyond density functional theory by treating a local subspace of the Hamiltonian more effectively. Application of our method to GaAs, SrMnO$_3$, and Co demonstrates that selectively localized Wannier functions can offer improvements over the maximally localized Wannier function technique.

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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