Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 46: Poster Organic Molecules on Inorganic Substrates: Electronic, Optical and Other Properties
O 46.13: Poster
Dienstag, 18. März 2025, 18:00–20:00, P2
Spin Hall Magnetoresistance as a Probe for Chiral-Induced Spin Selectivity — •Simon Sochiera1, Ashish Moharana1, Yael Kapon2, David Anthofer1, Fabian Kammerbauer1, Akashdeep Akashdeep1, Shira Yochelis2, Mathias Kläui1, Yossi Paltiel2, and Angela Wittmann1 — 1Institute for Physics JGU, Mainz, Germany — 2Hebrew University of Jerusalem, Jerusalem, Israel
Chiral molecules have gained significant attention in the spintronics community due to their ability to polarize electron spin angular momentum without any heavy metal atoms via the chiral-induced spin selectivity (CISS) [1] effect. Several optical and electrical methods confirmed the CISS effect. However, despite numerous theoretical approaches, the fundamental mechanisms of the CISS effect are still an open question. A recent experiment [2] reported a significant modulation of spin-to-charge conversion with chiral molecules in a spin-pumping experiment. Building on this result, we create a hybrid structure by combining a well-established spin Hall magnetoresistance (SMR) experiment with chiral molecules. The SMR relies on the reflection and absorption of spin currents at interfaces adjacent to a layer exhibiting an (inverse) spin Hall effect, such as a heavy metal. This allows for direct probing of the spin-to-charge conversion modulation by chiral molecules. Combined with the results established in the spin-pumping experiment, this paves the path toward designing new chiral-molecule-based spin-torque devices.
[1]: R. Naaman et al., Nat. Rev. Chem. 3, 250 (2019)
[2]: A. Moharana et al., arXiv:2402.19246 (2024)
Keywords: Spin Hall effect; CISS; Hybrid interfaces; Magnetoresistance; Spin transport