Magnetic structure and excitations of the topological semimetal YbMnBi2
We investigated the magnetic structure and dynamics of YbMnBi2, with elastic and inelastic neutron scattering, to shed light on the topological nature of the charge carriers in the antiferromagnetic phase. We confirm C-type antiferromagnetic ordering of the Mn spins below TN = 290 K and determine th...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal article |
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American Physical Society
2019
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| _version_ | 1826263076155949056 |
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| author | Soh, J Jacobsen, H Ouladdiaf, B Ivanov, A Piovano, A Tejsner, T Feng, Z Wang, H Su, H Guo, Y Shi, Y Boothroyd, A |
| author_facet | Soh, J Jacobsen, H Ouladdiaf, B Ivanov, A Piovano, A Tejsner, T Feng, Z Wang, H Su, H Guo, Y Shi, Y Boothroyd, A |
| author_sort | Soh, J |
| collection | OXFORD |
| description | We investigated the magnetic structure and dynamics of YbMnBi2, with elastic and inelastic neutron scattering, to shed light on the topological nature of the charge carriers in the antiferromagnetic phase. We confirm C-type antiferromagnetic ordering of the Mn spins below TN = 290 K and determine that the spins point along the c axis to within about 3◦. The observed magnon spectrum can be described very well by the same effective spin Hamiltonian that was used previously to model the magnon spectrum of CaMnBi2. Our results show conclusively that the creation of Weyl nodes in YbMnBi2 by the time-reversal symmetry-breaking mechanism can be excluded in the bulk. |
| first_indexed | 2024-03-06T19:45:56Z |
| format | Journal article |
| id | oxford-uuid:224d4342-c6e1-4c31-91d6-cf47c81375cb |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:45:56Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:224d4342-c6e1-4c31-91d6-cf47c81375cb2022-03-26T11:38:03ZMagnetic structure and excitations of the topological semimetal YbMnBi2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:224d4342-c6e1-4c31-91d6-cf47c81375cbSymplectic Elements at OxfordAmerican Physical Society2019Soh, JJacobsen, HOuladdiaf, BIvanov, APiovano, ATejsner, TFeng, ZWang, HSu, HGuo, YShi, YBoothroyd, AWe investigated the magnetic structure and dynamics of YbMnBi2, with elastic and inelastic neutron scattering, to shed light on the topological nature of the charge carriers in the antiferromagnetic phase. We confirm C-type antiferromagnetic ordering of the Mn spins below TN = 290 K and determine that the spins point along the c axis to within about 3◦. The observed magnon spectrum can be described very well by the same effective spin Hamiltonian that was used previously to model the magnon spectrum of CaMnBi2. Our results show conclusively that the creation of Weyl nodes in YbMnBi2 by the time-reversal symmetry-breaking mechanism can be excluded in the bulk. |
| spellingShingle | Soh, J Jacobsen, H Ouladdiaf, B Ivanov, A Piovano, A Tejsner, T Feng, Z Wang, H Su, H Guo, Y Shi, Y Boothroyd, A Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title | Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title_full | Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title_fullStr | Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title_full_unstemmed | Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title_short | Magnetic structure and excitations of the topological semimetal YbMnBi2 |
| title_sort | magnetic structure and excitations of the topological semimetal ybmnbi2 |
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