- By:
- Gu, Yimeng; Hao, Yiqing ; Kao, Zeyu; Gu, Yiqing; Liu, Feiyang; Zheng, Shiyi; Cao, Huibo ; He, Lunhua; Zhao, Jun
- Journal Name:
- Physical Review B
- Page Number:
- 64403
- Volume:
- 110
- Issue Number:
- 6
- Publication Date:
- September 12, 2024
- View DOI Listing:
- https://doi.org/10.1103/PhysRevB.110.064403
Abstract
We report a comprehensive investigation of the lattice and magnetic structure in van der Waals antiferromagnet VBr3, characterized by a BiI3-type structure at room temperature. Neutron diffraction experiments were performed on both polycrystalline and single-crystalline VBr3 samples, revealing clear magnetic Bragg peaks emerging below the Néel temperature of 𝑇𝑁=26.5 K. These magnetic Bragg peaks can be indexed by 𝒌=(0, 0.5, 1) in hexagonal notation. Our refinement analysis suggests that the antiferromagnetic order in VBr3 manifests as a zigzag structure. Moreover, we observed peak splitting for nuclear Bragg peaks in the HK plane below the structure transition temperature of 𝑇𝑆=90.4 K, indicating the breaking of threefold symmetry within the 𝑎𝑏 plane.
