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Static electric field in one-dimensional insulators without boundaries

机译:一维无边界绝缘子中的静电场

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摘要

In this brief report, we show that in a one-dimensional insulating system with periodic boundary conditions, the coefficient of the 8 term in the effective theory is not only determined by the topological index /' Ziaeocc ("toI It I"*") ^- Specifically, the relative position between the electronic orbitals and the ions also alters the coefficient, as one would expect when one identifies —eO/ln as the polarization. This resolves a paradox when we apply our previous result to the Su-Shreiffer-Heeger model, where the two ground states related by a lattice translation have 8 differed by n. We also show that the static dielectric screening is the same with or without boundaries, in contrast to comments made in our previous paper.
机译:在这份简短的报告中,我们表明在具有周期性边界条件的一维绝缘系统中,有效理论中的8项系数不仅取决于拓扑指数/'Ziaeocc(“ toI It I” *“) ^-具体来说,电子轨道与离子之间的相对位置也会改变系数,就像人们将-eO / ln标识为极化时所期望的那样,当我们将先前的结果应用于Su-Shreiffer-时,这解决了一个悖论。 Heeger模型,其中与晶格平移相关的两个基态相差8个n,我们还表明,与我们之前的论文相比,静态介电屏蔽在有边界或无边界的情况下都是相同的。

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  • 来源
    《Physical review》 |2011年第11期|p.42-45|共4页
  • 作者单位

    Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

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  • 正文语种 eng
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