Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 36: Molecular Magnetism and Magnetic Particles / Clusters I
MA 36.8: Vortrag
Mittwoch, 11. März 2026, 17:00–17:15, POT/0151
Tuning chiral-induced unidirectional spin-charge conversion via molecular organization — •Ashish Moharana1, Zhitian Ling2, Hao Wu2, Tomasz Marszalek2, and Angela Wittmann1 — 1Institut für Physik, Johannes-Gutenberg-Universität Mainz, 55099 Mainz, Germany — 2Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
The observation of spin-dependent transmission of electrons through chiral molecules has led to the discovery of chiral-induced spin selectivity (CISS). The high efficiency of the spin filtering effect in chiral molecules has recently gained significant interest due to the high potential for novel hybrid molecule magnetic spintronics applications. However, the fundamental mechanisms underlying the CISS effect at the molecule-metal interface remain an open challenge. In our work, we explore spin-to-charge conversion at hybrid chiral helical nanographene and heavy metal interfaces. We demonstrate that spin-to-charge conversion in hybrid chiral heterostructures can be tuned by controlling the ordering, and crystallinity of helical nanographene molecules at the interface. We show a more than two-fold increase in interfacial CISS efficiency with increasing molecular crystallinity. Quantifying the impact of spin to charge as a function of the molecular structure reveals the role of the molecular design and organization in the spin filtering effect, paving the path toward the three-dimensional engineering of hybrid interfaces.
Keywords: chiral; CISS; hybrid interfaces; spintronics; spin-to-charge