Fransson Jonas
Department of Physics and Astronomy, Uppsala University, Box 516, 75121 Uppsala, Sweden.
Nano Lett. 2021 Apr 14;21(7):3026-3032. doi: 10.1021/acs.nanolett.1c00183. Epub 2021 Mar 24.
Chiral induced spin selectivity is a phenomenon that has been attributed to chirality, spin-orbit interactions, and nonequilibrium conditions, while the role of electron exchange and correlations have been investigated only marginally until very recently. However, as recent experiments show that chiral molecules acquire a finite spin-polarization merely by being in contact with a metallic surface, these results suggest that electron correlations play a more crucial role for the emergence of the phenomenon than previously thought. Here, it is demonstrated that molecular vibrations give rise to molecular charge redistribution and accompany spin-polarization when coupling a chiral molecule to a nonmagnetic metal. The presented theory opens up new routes to construct a comprehensive picture of enantiomer separation.
手性诱导自旋选择性是一种归因于手性、自旋-轨道相互作用和非平衡条件的现象，而电子交换和关联的作用直到最近才受到很少的研究。然而，最近的实验表明，手性分子仅通过与金属表面接触就能获得有限的自旋极化，这些结果表明，电子关联对该现象出现所起的作用比之前认为的更为关键。本文证明，当将手性分子与非磁性金属耦合时，分子振动会导致分子电荷重新分布并伴随自旋极化。所提出的理论为构建对映体分离的全面图景开辟了新途径。
