论文标题
手性腔诱导自旋选择性
Chiral cavity induced spin selectivity
论文作者
论文摘要
手性诱导的自旋选择性（CISS）是一种现象，当电子旋转通过手性分子传输时，它们是极化的，并且自旋极化取决于手性分子的触手可及。在这项研究中，我们表明可以通过将电子耦合到手性光学腔的单个模式来实现自旋选择性。通过使用非平衡绿色功能方法研究自旋依赖性电子传输，如果倾向的速率足够小，则证明两端设置中的自旋极化接近统一，并且两个铅的平均化学电位在适当的值范围内，这是由于空洞模式的高频率而狭窄。为了获得大型自旋极化的更广泛的能量，我们提出将手性分子中的CISS与光 - 物质相互作用结合在一起。为了进行演示，评估了通过强烈耦合到手性腔模式的螺旋分子传输的电子的自旋极化。
Chiral-induced spin selectivity (CISS) is a phenomenon in which electron spins are polarized as they are transported through chiral molecules, and the spin polarization depends on the handedness of the chiral molecule. In this study, we show that spin selectivity can be realized in achiral materials by coupling electrons to a single mode of a chiral optical cavity. By investigating spin-dependent electron transport using the nonequilibrium Green's function approach, the spin polarization in a two-terminal setup is demonstrated to approach unity if the rate of dephasing is sufficiently small and the average chemical potential of the two leads is within an appropriate range of values, which is narrow because of the high frequency of the cavity mode. To obtain a wider range of energies for a large spin polarization, we propose to combine the CISS in chiral molecules with the light-matter interactions. For demonstration, the spin polarization of electrons transported through a helical molecule strongly coupled to a chiral cavity mode is evaluated.
