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PGI Colloquium:
Prof. Dr. Ron Naaman,
Weizmann Institute, Rehovot, Israel

Online talk

Please note: You will receive the link to the online talk in the e-mail invitation, usually sent out a few days before the lecture takes place. It is also available on request from the contact person below.

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20 Nov 2020 11:00

The Electron Spin and Chiral Systems – Merging that Results in Novel Properties

BildCopyright: Prof Dr. Naaman

Abstract

Spin based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials. 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],[2] was found, among others, in bio-molecules and in bio-systems. It has interesting implications for the production of new types of spintronics devices[3],[4] in controlling magnetization,[5] and on electron transfer and conduction. Recently we 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.[6]

References

[1] The Chiral Induced Spin Selectivity Effect, Naaman, R.; Waldeck, D.H. J. Phys. Chem. Lett. (feature), 3, 2178 (2012)

[2] Spintronics and Chirality: Spin Selectivity in Electron Transport Through Chiral Molecules, R. Naaman, D. H. Waldeck Ann. Rev. Phys. Chem., 66, 263 (2015).

[3] Magnetization switching in ferromagnets by adsorbed chiral molecules without current or external magnetic field, O. Ben Dor,  S. Yochelis, A. Radko, K. Vankayala, E. Capua, A. Capua, S.-H. Yang, L. T. Baczewski, S. S. P. Parkin, R. Naaman, and Y. Paltiel, Nat. Comm., 8:14567 (2017).

[4] A new approach towards spintronics- spintronics with no magnets, K. Michaeli, V.  Varade, R. Naaman, D. Waldeck, Journal of Physics: Condensed Matter, 29, 103002  (2017).

[5]  E. Z. B. Smolinsky, A. Neubauer, A. Kumar, S. Yochelis, E.l Capua, R. Carmieli, Y. Paltiel, R. Naaman, K. Michaeli, Electric field controlled magnetization in GaAs/AlGaAs heterostructures-chiral organic molecules hybrids, J. Phys. Chem. Lett. 10, 1139–1145 (2019).

[6] Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates, K. Banerjee-Ghosh, O. Ben Dor, F. Tassinari, E. Capua, S. Yochelis, A. Capua, S.-H. Yang, S. S. P. Parkin, S. Sarkar, L. Kronik, L. T. Baczewski, R. Naaman, Y. Paltiel, Science 360, 1331 (2018).

Contact

Dr. Daniel Bürgler
Phone: +49 2461 61-4214
Fax: +49 2461 61-4443
email: d.buergler@fz-juelich.de