Spin Waves and Magnetic Exchange Hamiltonian in CrSBr
Abstract CrSBr is an air‐stable two‐dimensional (2D) van der Waals semiconducting magnet with great technological promise, but its atomic‐scale magnetic interactions—crucial information for high‐frequency switching—are poorly understood. An experimental study is presented to determine the CrSBr magn...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-09-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202202467 |
| _version_ | 1798004357050925056 |
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| author | Allen Scheie Michael Ziebel Daniel G. Chica Youn June Bae Xiaoping Wang Alexander I. Kolesnikov Xiaoyang Zhu Xavier Roy |
| author_facet | Allen Scheie Michael Ziebel Daniel G. Chica Youn June Bae Xiaoping Wang Alexander I. Kolesnikov Xiaoyang Zhu Xavier Roy |
| author_sort | Allen Scheie |
| collection | DOAJ |
| description | Abstract CrSBr is an air‐stable two‐dimensional (2D) van der Waals semiconducting magnet with great technological promise, but its atomic‐scale magnetic interactions—crucial information for high‐frequency switching—are poorly understood. An experimental study is presented to determine the CrSBr magnetic exchange Hamiltonian and bulk magnon spectrum. The A‐type antiferromagnetic order using single crystal neutron diffraction is confirmed here. The magnon dispersions are also measured using inelastic neutron scattering and rigorously fit the excitation modes to a spin wave model. The magnon spectrum is well described by an intra‐plane ferromagnetic Heisenberg exchange model with seven nearest in‐plane exchanges. This fitted exchange Hamiltonian enables theoretical predictions of CrSBr behavior: as one example, the fitted Hamiltonian is used to predict the presence of chiral magnon edge modes with a spin‐orbit enhanced CrSBr heterostructure. |
| first_indexed | 2024-04-11T12:23:31Z |
| format | Article |
| id | doaj.art-4a866bafeb54404ebb946c64150ff873 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-11T12:23:31Z |
| publishDate | 2022-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-4a866bafeb54404ebb946c64150ff8732022-12-22T04:24:02ZengWileyAdvanced Science2198-38442022-09-01925n/an/a10.1002/advs.202202467Spin Waves and Magnetic Exchange Hamiltonian in CrSBrAllen Scheie0Michael Ziebel1Daniel G. Chica2Youn June Bae3Xiaoping Wang4Alexander I. Kolesnikov5Xiaoyang Zhu6Xavier Roy7Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USADepartment of Chemistry Columbia University New York NY 10027 USADepartment of Chemistry Columbia University New York NY 10027 USADepartment of Chemistry Columbia University New York NY 10027 USANeutron Scattering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USANeutron Scattering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USADepartment of Chemistry Columbia University New York NY 10027 USADepartment of Chemistry Columbia University New York NY 10027 USAAbstract CrSBr is an air‐stable two‐dimensional (2D) van der Waals semiconducting magnet with great technological promise, but its atomic‐scale magnetic interactions—crucial information for high‐frequency switching—are poorly understood. An experimental study is presented to determine the CrSBr magnetic exchange Hamiltonian and bulk magnon spectrum. The A‐type antiferromagnetic order using single crystal neutron diffraction is confirmed here. The magnon dispersions are also measured using inelastic neutron scattering and rigorously fit the excitation modes to a spin wave model. The magnon spectrum is well described by an intra‐plane ferromagnetic Heisenberg exchange model with seven nearest in‐plane exchanges. This fitted exchange Hamiltonian enables theoretical predictions of CrSBr behavior: as one example, the fitted Hamiltonian is used to predict the presence of chiral magnon edge modes with a spin‐orbit enhanced CrSBr heterostructure.https://doi.org/10.1002/advs.202202467magnetismneutron scatteringspin waves2D materials |
| spellingShingle | Allen Scheie Michael Ziebel Daniel G. Chica Youn June Bae Xiaoping Wang Alexander I. Kolesnikov Xiaoyang Zhu Xavier Roy Spin Waves and Magnetic Exchange Hamiltonian in CrSBr Advanced Science magnetism neutron scattering spin waves 2D materials |
| title | Spin Waves and Magnetic Exchange Hamiltonian in CrSBr |
| title_full | Spin Waves and Magnetic Exchange Hamiltonian in CrSBr |
| title_fullStr | Spin Waves and Magnetic Exchange Hamiltonian in CrSBr |
| title_full_unstemmed | Spin Waves and Magnetic Exchange Hamiltonian in CrSBr |
| title_short | Spin Waves and Magnetic Exchange Hamiltonian in CrSBr |
| title_sort | spin waves and magnetic exchange hamiltonian in crsbr |
| topic | magnetism neutron scattering spin waves 2D materials |
| url | https://doi.org/10.1002/advs.202202467 |
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