Connection between f-electron correlations and magnetic excitations in UTe2
Abstract The detailed anisotropic dispersion of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe2 is revealed using inelastic neutron scattering. The magnetic excitations emerge from the Brillouin zone boundary at the high symmetry Y and T points...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-024-00720-9 |
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| author | Thomas Halloran Peter Czajka Gicela Saucedo Salas Corey E. Frank Chang-Jong Kang J. A. Rodriguez-Rivera Jakob Lass Daniel G. Mazzone Marc Janoschek Gabriel Kotliar Nicholas P. Butch |
| author_facet | Thomas Halloran Peter Czajka Gicela Saucedo Salas Corey E. Frank Chang-Jong Kang J. A. Rodriguez-Rivera Jakob Lass Daniel G. Mazzone Marc Janoschek Gabriel Kotliar Nicholas P. Butch |
| author_sort | Thomas Halloran |
| collection | DOAJ |
| description | Abstract The detailed anisotropic dispersion of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe2 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 $$\hat{b}$$ b ̂ -axis. In applied magnetic fields to at least μ 0 H = 11 T along the $$\hat{c}-{\rm{axis}}$$ c ̂ − axis , the magnetism is found to be field-independent in the (h k0) plane. The scattering intensity is consistent with that expected from U3+/U4+ f-electron spins with preferential orientation along the crystallographic $$\hat{a}$$ a ̂ -axis, and a fluctuating magnetic moment of μ e f f =1.7(5) μ B . We propose interband spin excitons arising from f-electron hybridization as a possible origin of the magnetic excitations in UTe2. |
| format | Article |
| id | doaj-art-76e2d82774c4465cb67e2323ca864436 |
| institution | Kabale University |
| issn | 2397-4648 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj-art-76e2d82774c4465cb67e2323ca8644362025-01-05T12:07:50ZengNature Portfolionpj Quantum Materials2397-46482025-01-011011810.1038/s41535-024-00720-9Connection between f-electron correlations and magnetic excitations in UTe2Thomas Halloran0Peter Czajka1Gicela Saucedo Salas2Corey E. Frank3Chang-Jong Kang4J. A. Rodriguez-Rivera5Jakob Lass6Daniel G. Mazzone7Marc Janoschek8Gabriel Kotliar9Nicholas P. Butch10NIST Center for Neutron ResearchNIST Center for Neutron ResearchNIST Center for Neutron ResearchNIST Center for Neutron ResearchDepartment of Physics, Chungnam National UniversityNIST Center for Neutron ResearchLaboratory for Neutron Scattering and Imaging, Paul Scherrer InstituteLaboratory for Neutron Scattering and Imaging, Paul Scherrer InstituteLaboratory for Neutron and Muon Instrumentation, PSI Center for Neutron and Muon Sciences, Paul Scherrer InstituteDepartment of Physics and Astronomy, Rutgers UniversityNIST Center for Neutron ResearchAbstract The detailed anisotropic dispersion of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe2 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 $$\hat{b}$$ b ̂ -axis. In applied magnetic fields to at least μ 0 H = 11 T along the $$\hat{c}-{\rm{axis}}$$ c ̂ − axis , the magnetism is found to be field-independent in the (h k0) plane. The scattering intensity is consistent with that expected from U3+/U4+ f-electron spins with preferential orientation along the crystallographic $$\hat{a}$$ a ̂ -axis, and a fluctuating magnetic moment of μ e f f =1.7(5) μ B . We propose interband spin excitons arising from f-electron hybridization as a possible origin of the magnetic excitations in UTe2.https://doi.org/10.1038/s41535-024-00720-9 |
| spellingShingle | Thomas Halloran Peter Czajka Gicela Saucedo Salas Corey E. Frank Chang-Jong Kang J. A. Rodriguez-Rivera Jakob Lass Daniel G. Mazzone Marc Janoschek Gabriel Kotliar Nicholas P. Butch Connection between f-electron correlations and magnetic excitations in UTe2 npj Quantum Materials |
| title | Connection between f-electron correlations and magnetic excitations in UTe2 |
| title_full | Connection between f-electron correlations and magnetic excitations in UTe2 |
| title_fullStr | Connection between f-electron correlations and magnetic excitations in UTe2 |
| title_full_unstemmed | Connection between f-electron correlations and magnetic excitations in UTe2 |
| title_short | Connection between f-electron correlations and magnetic excitations in UTe2 |
| title_sort | connection between f electron correlations and magnetic excitations in ute2 |
| url | https://doi.org/10.1038/s41535-024-00720-9 |
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