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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.05720 |
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| _version_ | 1866908826886733824 |
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| author | Kapon, Yael Brann, Lilach Yochelis, Shira Fransson, Jonas Sasselov, Dimitar D. Paltiel, Yossi Ozturk, S. Furkan |
| author_facet | Kapon, Yael Brann, Lilach Yochelis, Shira Fransson, Jonas Sasselov, Dimitar D. Paltiel, Yossi Ozturk, S. Furkan |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_05720 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Temperature-Enhanced Coercive Field by Chiral Molecules Kapon, Yael Brann, Lilach Yochelis, Shira Fransson, Jonas Sasselov, Dimitar D. Paltiel, Yossi Ozturk, S. Furkan Chemical Physics Biological Physics 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. |
| title | Temperature-Enhanced Coercive Field by Chiral Molecules |
| topic | Chemical Physics Biological Physics |
| url | https://arxiv.org/abs/2412.05720 |