论文标题

手性诱导的旋转选择性效应 - 它是什么,不是什么,以及为什么它很重要

The Chiral Induced Spin Selectivity Effect -- What It Is, What It Is Not, And Why It Matters

论文作者

Fransson, J.

论文摘要

手性诱导的自旋选择性效应是一种激发态现象,可以使用光谱镜和传输测量进行探测。一方面,这种测量代表平均数量,另一方面,几乎所有理论描述只有少数例外,都与相关结构的能量依赖性属性有关。尽管这些特性可能与手性诱导的自旋选择性效应无关,但其中许多特性被归因于效果的起源或部分的一部分。在这里,可以证明,例如,自旋分辨的传输几乎没有提供有关手性诱导的自旋选择性效应的信息。此外,尽管可以在这种情况下使用有效的单电子理论,但为何这种描述不可行的原因给出了原因。

The chiral induced spin selectivity effect is an excited states phenomenon, which can be probed using photo-spectroscopy as well as transport measurements. On the one hand such measurements represent averaged quantities, on the other hand nearly all theoretical descriptions, with only a few exceptions, have been concerned with energy dependent properties of the pertinent structures. While those properties may or may not be relevant for the chiral induced spin selectivity effect, many of those properties have been attributed as being the, or part of the, origins of the effect. Here, it is demonstrated that, for instance, the spin-resolved transmission provides little, if any, information about the chiral induced spin selectivity effect. Moreover, although effective single-electron theory can be used in this context, reasons are given for why such descriptions are not viable.

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