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arXiv · 2509.05588

Anomalous Magnetoresistance beyond the Jullière Model for Spin Selectivity in Chiral Molecules

Tian-Yi Zhang·Yue Mao·Peng-Yi Liu·Ai-Min Guo·Qing-Feng Sun
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Abstract

The issue of anomalous high magnetoresistance, beyond the Jullière model, observed in nonmagnetic electrode-chiral molecular-ferromagnetic electrode devices has puzzled the community for a long time. Here, by considering the magnetic proximity effect which shifts the nonmagnetic-ferromagnetic interface toward chiral molecules, we show the anomalous high magnetoresistance beyond the spin polarization in ferromagnetic electrodes even in the very weak spin-orbit coupling. Our results are in excellent agreement with the experiments, demonstrating that the spin-orbit coupling plays a fundamental role in chiral-induced spin selectivity and the magnetic proximity effect can dramatically enhance the magnetoresistance. These results elucidate the interaction between chiral molecules and ferromagnetic electrodes and facilitate the design of chiral-based spintronic devices.

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Tian-Yi Zhang, Yue Mao, Peng-Yi Liu, Ai-Min Guo, Qing-Feng Sun. 2025-12-03. Anomalous Magnetoresistance beyond the Jullière Model for Spin Selectivity in Chiral Molecules. https://doi.org/10.1021/acs.jpclett.5c03104

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