Chirality-induced spin selectivity

Chirality-induced spin selectivity (CISS) refers to multiple phenomena where handedness of a chiral chemical compound influences the spin of transmitted or emitted electrons.

Experiments were able to demonstrate the effect in the form of polarization of electrons scattered from chiral molecules, spin-dependent transmission probabilities through layers of chiral molecules, spin-selectivity of electron-transport in a chiral medium and enantio-selectivity in chemical reactions induced by spin-polarized electrons.[1]

Theoretical models were able to qualitatively explain the effect using spin-orbit coupling (SOC). But quantitatively the predicted effect was always orders of magnitude smaller than what was measured in experiments. The mechanism underlying CISS is not completely understood.

References

  1. Evers, Ferdinand; Aharony, Amnon; Bar‐Gill, Nir; Entin‐Wohlman, Ora; Hedegård, Per; Hod, Oded; Jelinek, Pavel; Kamieniarz, Grzegorz; Lemeshko, Mikhail; Michaeli, Karen; Mujica, Vladimiro; Naaman, Ron; Paltiel, Yossi; Refaely‐Abramson, Sivan; Tal, Oren (April 2022). "Theory of Chirality Induced Spin Selectivity: Progress and Challenges". Advanced Materials. 34 (13): 2106629. arXiv:2108.09998. Bibcode:2022AdM....3406629E. doi:10.1002/adma.202106629. ISSN 0935-9648. PMID 35064943. S2CID 237266804.


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