Direct electrical access to the spin manifolds of individual monovalent lanthanide atoms
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866908335375122432 |
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| author | Czap, Gregory Noh, Kyungju Velasco Jr., Jairo Macfarlane, Roger M. Brune, Harald Lutz, Christopher P. |
| author_facet | Czap, Gregory Noh, Kyungju Velasco Jr., Jairo Macfarlane, Roger M. Brune, Harald Lutz, Christopher P. |
| contents | Lanthanide atoms show long magnetic lifetimes because of their strongly localized 4f electrons, but electrical control of their spins has been difficult because of their closed valence shell configurations. We achieved electron spin resonance of individual lanthanide atoms using a scanning tunneling microscope to probe the atoms bound to a protective insulating film. These atoms were prepared in the monovalent state with an unpaired 6s electron, enabling tunnel current to access their 4f electrons. Europium spectra display a rich array of transitions among the 54 combined electron and nuclear spin states. In contrast, samarium's ground state is a Kramers doublet with an extraordinarily large g-factor of nearly 5. These results demonstrate that all-electronic sensing and control of individual lanthanide spins is possible for quantum devices and spin-based electronics by using their rarely-observed monovalent cation state. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_11335 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Direct electrical access to the spin manifolds of individual monovalent lanthanide atoms Czap, Gregory Noh, Kyungju Velasco Jr., Jairo Macfarlane, Roger M. Brune, Harald Lutz, Christopher P. Mesoscale and Nanoscale Physics Atomic Physics Chemical Physics Lanthanide atoms show long magnetic lifetimes because of their strongly localized 4f electrons, but electrical control of their spins has been difficult because of their closed valence shell configurations. We achieved electron spin resonance of individual lanthanide atoms using a scanning tunneling microscope to probe the atoms bound to a protective insulating film. These atoms were prepared in the monovalent state with an unpaired 6s electron, enabling tunnel current to access their 4f electrons. Europium spectra display a rich array of transitions among the 54 combined electron and nuclear spin states. In contrast, samarium's ground state is a Kramers doublet with an extraordinarily large g-factor of nearly 5. These results demonstrate that all-electronic sensing and control of individual lanthanide spins is possible for quantum devices and spin-based electronics by using their rarely-observed monovalent cation state. |
| title | Direct electrical access to the spin manifolds of individual monovalent lanthanide atoms |
| topic | Mesoscale and Nanoscale Physics Atomic Physics Chemical Physics |
| url | https://arxiv.org/abs/2408.11335 |