Chirality-induced spin selectivity
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Chirality-induced spin selectivity (CISS) refers to multiple phenomena where handedness of a chiral chemical compound influences the spin of transmitted or emitted electrons. This effect was discovered by Prof. Ron Naaman and co-workers.[1]
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.[2]
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
- ^ Ray, K; Ananthavel, SP; Waldeck, DH; Naaman, R (February 1999). "Asymmetric scattering of polarized electrons by organized organic films of chiral molecules". Science. 283 (5403): 814. doi:10.1126/science.283.5403.814.
- ^ 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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