Orbital current signature using neutron diffraction
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908840703819776 |
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| author | Bounoua, Dalila Liège, William Sidis, Yvan Bourges, Philippe |
| author_facet | Bounoua, Dalila Liège, William Sidis, Yvan Bourges, Philippe |
| contents | We review the hallmarks of orbital loop currents in various correlated electron materials and how they have been evidenced using polarized neutron diffraction. Over the last 20 years, loop current signatures have been observed in high temperature copper oxide superconductors, iridates, copper oxides spin ladders and recently kagome vanadate superconductors. Such currents induce orbital magnetic moments within the unit cell of these quantum materials that can be detected through their interaction with the neutron spin. In addition to the usual description of orbital moments using point-like local magnetic moments, we here show an alternative description of the neutron magnetic cross-section involving the microscopic currents running between different atomic orbitals. We discuss the corresponding magnetic structure factors and the resulting quantitative differences between both approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17311 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Orbital current signature using neutron diffraction Bounoua, Dalila Liège, William Sidis, Yvan Bourges, Philippe Strongly Correlated Electrons Superconductivity We review the hallmarks of orbital loop currents in various correlated electron materials and how they have been evidenced using polarized neutron diffraction. Over the last 20 years, loop current signatures have been observed in high temperature copper oxide superconductors, iridates, copper oxides spin ladders and recently kagome vanadate superconductors. Such currents induce orbital magnetic moments within the unit cell of these quantum materials that can be detected through their interaction with the neutron spin. In addition to the usual description of orbital moments using point-like local magnetic moments, we here show an alternative description of the neutron magnetic cross-section involving the microscopic currents running between different atomic orbitals. We discuss the corresponding magnetic structure factors and the resulting quantitative differences between both approaches. |
| title | Orbital current signature using neutron diffraction |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2602.17311 |