Field-direction sensitivity of Kondo hybridization in UTe$_2$
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866910057526984704 |
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| author | Halloran, Thomas Salas, Gicela Saucedo Lewin, Sylvia K. Rodriguez-Rivera, J. A. Sarkis, Colin L. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Butch, Nicholas P. |
| author_facet | Halloran, Thomas Salas, Gicela Saucedo Lewin, Sylvia K. Rodriguez-Rivera, J. A. Sarkis, Colin L. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Butch, Nicholas P. |
| contents | Neutron scattering experiments on the spin-triplet superconductor UTe$_2$ have established that the dominant low-energy magnetic response is along Brillouin zone boundaries, resembling the magnetic susceptibility of narrow-gap interband excitations. We report a study of the sensitivity of these excitations to magnetic field along the crystallographic $\hat{a}$-axis. Up to fields of $μ_0 H$=13 T, the maximal inelastic neutron spectral weight increases in energy transfer, with a pronounced increase in $d\hbarω_{peak}/dH$ near $μ_0 H$=7 T. This behavior parallels the field and temperature dependent features of the electrical resistivity that are associated with Kondo hybridization. Our measurements suggest that $\hat{a}$-axis fields near $μ_0 H$=7~T induce a change in the hybridization between heavy $f$-electrons and the bare conduction band. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_17037 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Field-direction sensitivity of Kondo hybridization in UTe$_2$ Halloran, Thomas Salas, Gicela Saucedo Lewin, Sylvia K. Rodriguez-Rivera, J. A. Sarkis, Colin L. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Butch, Nicholas P. Strongly Correlated Electrons Neutron scattering experiments on the spin-triplet superconductor UTe$_2$ have established that the dominant low-energy magnetic response is along Brillouin zone boundaries, resembling the magnetic susceptibility of narrow-gap interband excitations. We report a study of the sensitivity of these excitations to magnetic field along the crystallographic $\hat{a}$-axis. Up to fields of $μ_0 H$=13 T, the maximal inelastic neutron spectral weight increases in energy transfer, with a pronounced increase in $d\hbarω_{peak}/dH$ near $μ_0 H$=7 T. This behavior parallels the field and temperature dependent features of the electrical resistivity that are associated with Kondo hybridization. Our measurements suggest that $\hat{a}$-axis fields near $μ_0 H$=7~T induce a change in the hybridization between heavy $f$-electrons and the bare conduction band. |
| title | Field-direction sensitivity of Kondo hybridization in UTe$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.17037 |