Low-energy spin dynamics in a Kitaev material Na3Ni2BiO6 investigated by NMR
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910763083366400 |
|---|---|
| author | Shi, Xinyu Cui, Yi Shangguan, Yanyan Xu, Xiaoyu Wu, Zhanlong Hu, Ze Li, Shuo Du, Kefan Chen, Ying Ma, Long Liu, Zhengxin Wen, Jinsheng Zhang, Jinshan Yu, Weiqiang |
| author_facet | Shi, Xinyu Cui, Yi Shangguan, Yanyan Xu, Xiaoyu Wu, Zhanlong Hu, Ze Li, Shuo Du, Kefan Chen, Ying Ma, Long Liu, Zhengxin Wen, Jinsheng Zhang, Jinshan Yu, Weiqiang |
| contents | We performed 23Na NMR and magnetization measurements on an S = 1, quasi-2D honeycomb lattice antiferromagnet Na3Ni2BiO6. A large positive Curie-Weiss constant of 22.9 K is observed. The NMR spectra at low fields are consistent with a "zigzag" magnetic order, indicating a large easy-axis anisotropy. With field applied along the c* axis, the NMR spectra confirm the existence of a 1/3-magnetization plateau phase between 5.1 T and 7.1 T. The transition from the zigzag order to the 1/3-magnetization plateau phase is also found to be a first-order type. A monotonic decrease of the spin gap is revealed in the 1/3-magnetization plateau phase, which reaches zero at a quantum critical field Hc = 8.35 T before entering the fully polarized phase. These data suggest the existence of exchange frustration in the system along with strong ferromagnetic interactions, hosting the possibility for Kitaev physics. Besides, well below the ordered phase, the 1/T1 at high fields shows either a level off or an enhancement upon cooling below 3 K, which suggests the existence of low-energy fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07490 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Low-energy spin dynamics in a Kitaev material Na3Ni2BiO6 investigated by NMR Shi, Xinyu Cui, Yi Shangguan, Yanyan Xu, Xiaoyu Wu, Zhanlong Hu, Ze Li, Shuo Du, Kefan Chen, Ying Ma, Long Liu, Zhengxin Wen, Jinsheng Zhang, Jinshan Yu, Weiqiang Strongly Correlated Electrons We performed 23Na NMR and magnetization measurements on an S = 1, quasi-2D honeycomb lattice antiferromagnet Na3Ni2BiO6. A large positive Curie-Weiss constant of 22.9 K is observed. The NMR spectra at low fields are consistent with a "zigzag" magnetic order, indicating a large easy-axis anisotropy. With field applied along the c* axis, the NMR spectra confirm the existence of a 1/3-magnetization plateau phase between 5.1 T and 7.1 T. The transition from the zigzag order to the 1/3-magnetization plateau phase is also found to be a first-order type. A monotonic decrease of the spin gap is revealed in the 1/3-magnetization plateau phase, which reaches zero at a quantum critical field Hc = 8.35 T before entering the fully polarized phase. These data suggest the existence of exchange frustration in the system along with strong ferromagnetic interactions, hosting the possibility for Kitaev physics. Besides, well below the ordered phase, the 1/T1 at high fields shows either a level off or an enhancement upon cooling below 3 K, which suggests the existence of low-energy fluctuations. |
| title | Low-energy spin dynamics in a Kitaev material Na3Ni2BiO6 investigated by NMR |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2404.07490 |