Connection between f-electron correlations and magnetic excitations in UTe2
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866909307798290432 |
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| author | Halloran, Thomas Czajka, Peter Salas, Gicela Saucedo Frank, Corey Kang, Chang-Jong Rodriguez-Rivera, J. A. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Kotliar, Gabi Butch, Nicholas P. |
| author_facet | Halloran, Thomas Czajka, Peter Salas, Gicela Saucedo Frank, Corey Kang, Chang-Jong Rodriguez-Rivera, J. A. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Kotliar, Gabi Butch, Nicholas P. |
| contents | The detailed anisotropy of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe$_2$ is revealed using inelastic neutron scattering. The magnetic excitations emerge from the Brillouin zone boundary at the high symmetry $Y$ and $T$ points and disperse along the crystallographic $\hat{b}$-axis. In applied magnetic fields to at least $μ_0 H=11$~T along the $\hat{c}-$axis, the magnetism is found to be field-independent in the $(hk0)$ plane. The scattering intensity is consistent with that expected from U$^{3+}$/U$^{4+}$ $f$-electron spins with preferential orientation along the crystallographic $\hat{a}$-axis, and a fluctuating magnetic moment of 2.3(7) $μ_B$. These characteristics indicate that the excitations are due to intraband spin excitons arising from $f$-electron hybridization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_14619 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Connection between f-electron correlations and magnetic excitations in UTe2 Halloran, Thomas Czajka, Peter Salas, Gicela Saucedo Frank, Corey Kang, Chang-Jong Rodriguez-Rivera, J. A. Lass, Jakob Mazzone, Daniel G. Janoschek, Marc Kotliar, Gabi Butch, Nicholas P. Strongly Correlated Electrons Superconductivity The detailed anisotropy of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe$_2$ is revealed using inelastic neutron scattering. The magnetic excitations emerge from the Brillouin zone boundary at the high symmetry $Y$ and $T$ points and disperse along the crystallographic $\hat{b}$-axis. In applied magnetic fields to at least $μ_0 H=11$~T along the $\hat{c}-$axis, the magnetism is found to be field-independent in the $(hk0)$ plane. The scattering intensity is consistent with that expected from U$^{3+}$/U$^{4+}$ $f$-electron spins with preferential orientation along the crystallographic $\hat{a}$-axis, and a fluctuating magnetic moment of 2.3(7) $μ_B$. These characteristics indicate that the excitations are due to intraband spin excitons arising from $f$-electron hybridization. |
| title | Connection between f-electron correlations and magnetic excitations in UTe2 |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2408.14619 |