Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel.
J Chem Phys. 2023 Jun 28;158(24). doi: 10.1063/5.0156491.
We demonstrate that angular momentum selectivity of particles traversing chiral environments is not limited to the quantum regime and can be realized in classical scenarios also. In our classical variant, the electron spin, which is central to the quantum chirality induced spin selectivity (CISS) effect, is replaced by the self-rotation of a finite-volume body. The latter is coupled to the center of mass orbital motion of the body through a helical tube via wall friction that acts as a dissipative spin-orbit coupling term. As a specific example, we study C60 molecules that are initially spinning in opposite senses and investigate the effect of various external control parameters on their spatial separation when driven through a rigid helical channel. We highlight resemblances and inherent differences between the quantum CISS effect and its classical variant and discuss the potential of the latter to formulate a new paradigm for enantio-separation.
我们证明了穿过手性环境的粒子的角动量选择性不仅限于量子领域，也可以在经典场景中实现。在我们的经典变体中，电子自旋（量子手性诱导自旋选择性（CISS）效应的核心）被一个有限体积物体的自旋转所取代。后者通过螺旋管与物体的质心轨道运动耦合，通过壁摩擦作用作为耗散的自旋轨道耦合项。作为一个具体的例子，我们研究了初始自旋方向相反的 C60 分子，并研究了在通过刚性螺旋通道驱动时，各种外部控制参数对它们空间分离的影响。我们强调了量子 CISS 效应与其经典变体之间的相似之处和内在差异，并讨论了后者在手性分离的新范式中的潜在应用。
