Journal article
Yael Kapon, Lilach Brann, S. Yochelis, J. Fransson, D. Sasselov, Y. Paltiel, S. Ozturk
Journal of Physical Chemistry Letters, 2024
Journal of Physical Chemistry Letters, 2024
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Kapon, Y., Brann, L., Yochelis, S., Fransson, J., Sasselov, D., Paltiel, Y., & Ozturk, S. (2024). Temperature-Enhanced Coercive Field by Chiral Molecules. Journal of Physical Chemistry Letters.
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Kapon, Yael, Lilach Brann, S. Yochelis, J. Fransson, D. Sasselov, Y. Paltiel, and S. Ozturk. “Temperature-Enhanced Coercive Field by Chiral Molecules.” Journal of Physical Chemistry Letters (2024).
MLA
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Kapon, Yael, et al. “Temperature-Enhanced Coercive Field by Chiral Molecules.” Journal of Physical Chemistry Letters, 2024.
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@article{yael2024a,
title = {Temperature-Enhanced Coercive Field by Chiral Molecules},
year = {2024},
journal = {Journal of Physical Chemistry Letters},
author = {Kapon, Yael and Brann, Lilach and Yochelis, S. and Fransson, J. and Sasselov, D. and Paltiel, Y. and Ozturk, S.}
}
Abstract
The chiral-induced spin selectivity (CISS) effect demonstrates a strong coupling between electron spin and molecular chirality, enabling spin-controlled interactions between chiral molecules and magnetic surfaces. While CISS experiments have revealed robust changes in the spin-polarization properties of magnetic materials upon chiral molecular adsorption, the temperature dependence of these effects remains poorly understood. Here, we investigate the temperature dependence of the chirality-induced increase in magnetic coercivity by ribose-aminooxazoline (RAO) crystals on ferromagnetic surfaces. RAO was selected as a conglomerate-forming, thermodynamically stable crystalline chiral organic molecule with prebiotic relevance that has previously been shown to induce strong spin-dependent changes in magnetic minerals. Contrary to classical expectations that magnetic coercivity weakens at elevated temperatures, we observe a significant increase in magnetic coercivity (∼1 mT over a 60 °C temperature change) with increasing temperature. These results support a vibronic contribution to CISS arising from electron–phonon interactions and demonstrate that spin-dependent interactions between chiral molecules and magnetic surfaces can become more effective at higher temperatures, providing new insight into the microscopic origins of CISS and the environmental robustness of spin-controlled asymmetric processes.