Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets
We show that the mesoscopic incommensurate Z_{2} vortex crystals proposed for layered triangular anisotropic magnets can be most saliently identified by two distinctive signatures in dynamical spin response experiments: the presence of pseudo-Goldstone phononlike modes at low frequencies ω, associat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2019-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.1.013002 |
| _version_ | 1797211669248606208 |
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| author | Mengqun Li Natalia B. Perkins Ioannis Rousochatzakis |
| author_facet | Mengqun Li Natalia B. Perkins Ioannis Rousochatzakis |
| author_sort | Mengqun Li |
| collection | DOAJ |
| description | We show that the mesoscopic incommensurate Z_{2} vortex crystals proposed for layered triangular anisotropic magnets can be most saliently identified by two distinctive signatures in dynamical spin response experiments: the presence of pseudo-Goldstone phononlike modes at low frequencies ω, associated with the collective vibrations of the vortex cores, and a characteristic multiscattered intensity profile at higher ω, arising from a large number of Bragg reflections and magnon band gaps. These are direct fingerprints of the large vortex sizes and magnetic unit cells and the solitonic spin profile around the vortex cores. |
| first_indexed | 2024-04-24T10:30:10Z |
| format | Article |
| id | doaj.art-5df966322dbf4d10b1c3f059c024bad2 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:30:10Z |
| publishDate | 2019-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-5df966322dbf4d10b1c3f059c024bad22024-04-12T16:45:17ZengAmerican Physical SocietyPhysical Review Research2643-15642019-08-011101300210.1103/PhysRevResearch.1.013002Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnetsMengqun LiNatalia B. PerkinsIoannis RousochatzakisWe show that the mesoscopic incommensurate Z_{2} vortex crystals proposed for layered triangular anisotropic magnets can be most saliently identified by two distinctive signatures in dynamical spin response experiments: the presence of pseudo-Goldstone phononlike modes at low frequencies ω, associated with the collective vibrations of the vortex cores, and a characteristic multiscattered intensity profile at higher ω, arising from a large number of Bragg reflections and magnon band gaps. These are direct fingerprints of the large vortex sizes and magnetic unit cells and the solitonic spin profile around the vortex cores.http://doi.org/10.1103/PhysRevResearch.1.013002 |
| spellingShingle | Mengqun Li Natalia B. Perkins Ioannis Rousochatzakis Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets Physical Review Research |
| title | Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets |
| title_full | Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets |
| title_fullStr | Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets |
| title_full_unstemmed | Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets |
| title_short | Collective spin dynamics of Z_{2} vortex crystals in triangular Kitaev-Heisenberg antiferromagnets |
| title_sort | collective spin dynamics of z 2 vortex crystals in triangular kitaev heisenberg antiferromagnets |
| url | http://doi.org/10.1103/PhysRevResearch.1.013002 |
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