Magnetic Resonance Imaging of Single Organic Radicals with Sub-Molecular Resolution
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866910918681559040 |
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| author | Czap, Gregory Wolf, Christoph Reina-Gálvez, Jose Sherwood, Mark H. Lutz, Christopher P. |
| author_facet | Czap, Gregory Wolf, Christoph Reina-Gálvez, Jose Sherwood, Mark H. Lutz, Christopher P. |
| contents | Interest in the magnetism of organic compounds is growing because of new organic magnets, spin-based electronics and the diverse properties of magnetic edge states in graphene nanoribbons. Electron spin resonance spectroscopy combined with the scanning tunneling microscopy has recently been developed as a powerful tool to address individual magnetic atoms and molecules at the atomic scale. Here we demonstrate electron spin resonance and magnetic resonance imaging of all-organic radical anions adsorbed on a protective thin insulating film grown on a metal support. We show that using the highly localized exchange field of the magnetic tip apex allows visualization of the delocalized spin density with sub-molecular resolution, enabling spin-density tomography that can distinguish similar molecular species. These results provide new opportunities for visualizing spin density and magnetic interactions at the atomic scale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_18043 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic Resonance Imaging of Single Organic Radicals with Sub-Molecular Resolution Czap, Gregory Wolf, Christoph Reina-Gálvez, Jose Sherwood, Mark H. Lutz, Christopher P. Mesoscale and Nanoscale Physics Other Condensed Matter Atomic Physics Chemical Physics Interest in the magnetism of organic compounds is growing because of new organic magnets, spin-based electronics and the diverse properties of magnetic edge states in graphene nanoribbons. Electron spin resonance spectroscopy combined with the scanning tunneling microscopy has recently been developed as a powerful tool to address individual magnetic atoms and molecules at the atomic scale. Here we demonstrate electron spin resonance and magnetic resonance imaging of all-organic radical anions adsorbed on a protective thin insulating film grown on a metal support. We show that using the highly localized exchange field of the magnetic tip apex allows visualization of the delocalized spin density with sub-molecular resolution, enabling spin-density tomography that can distinguish similar molecular species. These results provide new opportunities for visualizing spin density and magnetic interactions at the atomic scale. |
| title | Magnetic Resonance Imaging of Single Organic Radicals with Sub-Molecular Resolution |
| topic | Mesoscale and Nanoscale Physics Other Condensed Matter Atomic Physics Chemical Physics |
| url | https://arxiv.org/abs/2504.18043 |