Chiral Molecules as Topological Devices- The Chiral Induced Spin Selectivity Effect

Ron Naaman

Spin based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials or materials with large spin orbit coupling. However, we found that chiral molecules act as spin filters for photoelectrons transmission, in electron transfer, and in electron transport.
The new effect, termed Chiral Induced Spin Selectivity(CISS) [1], was found, among others, in bio-molecules and in bio-systems as well as in inorganic chiral crystals. It has interesting implications for the production of new types of spintronics devices [2], in controlling magnetization [3], and on electron transfer and conduction. Recently we also found that charge polarization in chiral molecules is accompanied by spin polarization. This finding shed new light on spin dependent interaction between chiral molecules and between them and magnetic surfaces [4].

[1] R. Naaman, Y. Paltiel, D,H, Waldeck, J. Phys. Chem. Lett., 11 (2020) 3660
[2] K. Michaeli, V. Varade, R. Naaman, D. A Waldeck, J. of Physics: Condensed Matter. 29 (2017) 103002
[3] E. Z. B. Smolinsky et al. J. Phys. Chem. Lett. 10 (2019) 1139
[4] K. Banerjee-Ghosh, et. al., Science 360 (2018) 1331