| Autor: |
Shu, Mingfang, Dong, Weicen, Jiao, Jinlong, Wu, Jiangtao, lin, Gaoting, Hong, Tao, Cao, Huibo, Matsuda, Masaaki, Tian, Wei, Chi, Songxue, Ehlers, Georg, Ouyang, Zhongwen, Chen, Hongwei, Zou, Youming, Qu, Zhe, Huang, Qing, Zhou, Haidong, Kamiya, Yoshitomo, Ma, Jie |
| Rok vydání: |
2023 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
We study the ground state and spin excitations in Ba3MnSb2O9, an easy-plane S = 5/2 triangular lattice antiferromagnet. By combining single-crystal neutron scattering, electric spin resonance (ESR), and spin wave calculations, we determine the frustrated quasi-two-dimensional spin Hamiltonian parameters describing the material. While the material has a slight monoclinic structural distortion, which could allow for isosceles-triangular exchanges and biaxial anisotropy by symmetry, we observe no deviation from the behavior expected for spin waves in the in-plane 120o state. Even the easy-plane anisotropy is so small that it can only be detected by ESR in our study. In conjunction with the quasi-two-dimensionality, our study establishes that Ba3MnSb2O9 is a nearly ideal triangular lattice antiferromagnet with the quasi-classical spin S = 5/2, which suggests that it has the potential for an experimental study of Z- or Z2-vortex excitations. |
| Databáze: |
arXiv |
| Externí odkaz: |
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