Rise of Chiral Spintronics

Chirality is one of the fundamental asymmetries in nature. Recently chiral nature of magnetic and nonmagnetic structures have been enormously highlighted and arisen to be very useful for potential application to not only spintronics but biology and pharmaceutical industries For example, it has been reported that the combination with spin-orbit interaction such as spin Hall effect can be very efficient in manipulation of magnetic elements [1], and spin currents in chiral molecules induced by chirality interacts with magnetic structures [2]. I will present recent remarkable progress in emergent novel phenomena associated with chiral properties from not only emergent magnetic nanostructures but chiral molecules: spin-orbit torques from perpendicularly magnetized ultrathin films [2], exchange coupling torque [3] and entirely new phase of chiral exchange drag [4] from synthetic antiferromagnets, and separation of chiral molecules by magnetic structure: enantiomer [5]. In the end I will discuss potential applications and promising outlooks from these new findings.

[1] S. S. P. Parkin, and S.-H. Yang, Nat. Nano. (2015).
[2] O. B. Dor, S. Yochelis, A. Radko, K. Vankayala, E. Capua, A. Capua, S.-H. Yang, L. T. Baczewski, S. S. P. Parkin, R. Naaman, Y. Paltiel, Nat. Comms 8, 14567 (2017).
[3] K.-S. Ryu, L. Thomas, S.-H. Yang, and S. S. P. Parkin, Nat. Nano. 8, 527 (2013).
[4] S.-H. Yang, K.-S. Ryu, and S. S. P. Parkin, Nat. Nano. 10, 221 (2015).
[5] S.-H. Yang, C. Garg, and S. S. P. Parkin, “Chiral Exchange Drag and Chirality Oscillations in Synthetic Antiferromagnets”, Nature Physics (2018) under review.
[6] K. Banerjee-Ghosh, O.B. 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, and Y. Paltiel, Science 360, 1331 (2018).