Field-induced phase transitions and quantum criticality in a honeycomb antiferromagnet Na3Co2SbO6
| Autor: | Hu, Ze, Chen, Yue, Cui, Yi, Li, Shuo, Li, Cong, Xu, Xiaoyu, Chen, Ying, Li, Xintong, Gu, Yuchen, Yu, Rong, Zhou, Rui, Li, Yuan, Yu, Weiqiang |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.109.054411 |
| Popis: | We performed 23Na NMR measurements on a single-domain crystal of the Kitaev material Na3Co2SbO6, with magnetic field applied along the crystalline a axis. A positive Curie-Weiss constant is obtained from the NMR Knight shift, which suggests the existence of ferromagnetic exchange couplings. The antiferromagnetic ordering is found to be suppressed at a field of 1.9 T. Inside the ordered phase, our data reveal two additional phase transitions. At 1.9 T, the spin-lattice relaxation rate 1/23T1 establishes a quantum critical behavior at high temperatures. However, at low temperatures, a gapped behavior is observed at the critical field, which suggests a weakly first-order transition instead and a possible field-induced quantum spin liquid. Our results reveal complex microscopic interactions in the system, which may help to search for possible quantum spin liquids. Comment: 9 pages, 9 figures |
| Databáze: | arXiv |
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