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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2605.23755 |
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| _version_ | 1866918518702735360 |
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| author | Scott, Ewan Chen, Yaqi Turaev, Michael Yzeiri, Tarkan Hooley, Chris Wójcik, Krzysztof P. Kwasigroch, Michał P. |
| author_facet | Scott, Ewan Chen, Yaqi Turaev, Michael Yzeiri, Tarkan Hooley, Chris Wójcik, Krzysztof P. Kwasigroch, Michał P. |
| contents | We consider magnetic impurities coupled to a conduction sea via a fully isotropic ferromagnetic spin-exchange term, the strength of which depends on the conduction-electron modes involved in the scattering. In the single-impurity case we show both analytically and numerically that there exists a parameter regime in which the conventional Kondo effect develops at low temperatures, leading to a singlet ground state. In the case of a lattice of impurities, we show that this leads to a heavy Fermi liquid state that is energetically favored over magnetic ordering in a broad parameter range. We argue that these effects are analogs of Anderson-Morel superconductivity, and discuss routes to their experimental realization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_23755 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Kondo singlet from ferromagnetic coupling: an analog of Anderson-Morel superconductivity in the magnetic channel Scott, Ewan Chen, Yaqi Turaev, Michael Yzeiri, Tarkan Hooley, Chris Wójcik, Krzysztof P. Kwasigroch, Michał P. Strongly Correlated Electrons Superconductivity We consider magnetic impurities coupled to a conduction sea via a fully isotropic ferromagnetic spin-exchange term, the strength of which depends on the conduction-electron modes involved in the scattering. In the single-impurity case we show both analytically and numerically that there exists a parameter regime in which the conventional Kondo effect develops at low temperatures, leading to a singlet ground state. In the case of a lattice of impurities, we show that this leads to a heavy Fermi liquid state that is energetically favored over magnetic ordering in a broad parameter range. We argue that these effects are analogs of Anderson-Morel superconductivity, and discuss routes to their experimental realization. |
| title | Kondo singlet from ferromagnetic coupling: an analog of Anderson-Morel superconductivity in the magnetic channel |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2605.23755 |