Chiral spintronics utilizing the CISS effect

Chiral spintronics technology has the potential to overcome the limitations of other magnetic-based memory technologies and to facilitate the fabrication of inexpensive, high-density memory and other spintronics elements [1]. Recently, by utilizing the CISS effect we demonstrated a simple magnetless spin based magnetic memory [2-5]. When chiral molecules are adsorbed on the surface of thin ferromagnetic film, they induce magnetization perpendicular to the surface (the MIPAC effect) [6].

The MIPAC and chiral-chiral interactions enable to reduce memory size stabilizing chiral spin textures in magnetic thin films by tuning skyrmion properties [7]. Chiral molecules can locally manipulate magnetic properties by inducing magnetization through spin exchange interactions and by creating spin currents. The same effects were demonstrate using non-collinear antiferromagnetic thin films of Mn3Sn and chiral gating to achieve local, efficient antiferromagnetic memory. 

References

[1] See- Hun Yang, Ron Naaman, Yossi Paltiel and Stuart S. P. Parkin, Chiral spintronics, Nature Review Physics3, 328–343 (2021).

[2] O. Ben Dor, S. Yochelis, S. P. Mathew, R. Naaman, and Y. Paltiel, “A chiral-based magnetic memory device without a permanent magnet” Nature Communications 4, 2256 (2013).

[3] G. Koplovitz, et al. “Magnetic Nanoplatelet-Based Spin Memory Device Operating at Ambient Temperatures” Adv. Mater. 29, 1606748 (2017).

[4] H. Al-Bustami, H. et al. “Single Nanoparticle Magnetic Spin Memristor” Small 14, 1801249 (2018).

[5] H. Al-Bustami, S. Khaldi, O. Shoseyov, S. Yochelis, K. Killi, I. Berg, E. Gross, Y. Paltiel,* and R. Yerushalmi*, “Atomic and Molecular Layer Deposition of Chiral Thin Films Showing up to 99% Spin Selective Transport” Nano Letters 22, 3165-3172 (2022).

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

[7] Yael Kapon, Fabian Kammerbauer, Theo Balland, Shira Yochelis, Mathias Kläui, and Yossi Paltiel, Effects of Chiral Polypeptides on Skyrmion Stability and Dynamics, Nano Letters, 25, 1, 306–312 (2025).