We report a comprehensive Raman scattering study on layered MPS3（M = Mn, Fe, Ni）, a two-dimensional magnetic compound with weak van der Waals interlayer coupling. The observed Raman phonon modes have been well assigned by the combination of first-principles calculations and the polarization-resolved spectra. Careful symmetry analysis on the angle-dependent spectra demonstrates that the crystal symmetry is strictly described by C2hbut can be simplified to D3d with good accuracy. Interestingly, the three compounds share exactly the same lattice structure but show distinct magnetic structures. This provides us with a unique opportunity to study the effect of different magnetic orders on lattice dynamics in MPS3. Our results reveal that the in-plane Nel antiferromagnetic（AF） order in MnPS3 favors a spin–phonon coupling compared to the in-plane zig-zag AF in NiPS3 and FePS3. We have discussed the mechanism in terms of the folding of magnetic Brillouin zones. Our results provide insights into the relation between lattice dynamics and magnetism in the layered MPX3（M = transition metal, X = S, Se） family and shed light on the magnetism of monolayer MPX3materials.
类型: 期刊论文
作者: 王艺朦,张建丰,李承贺,马肖莉,籍建葶,金峰,雷和畅,刘凯,张玮璐,张清明
来源: Chinese Physics B 2019年05期
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 化学
单位: Department of Physics, Renmin University of China,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Department of Engineering and Applied Sciences, Sophia University,School of Physical Science and Technology, Lanzhou University
基金: Project supported by the Ministry of Science and Technology of China(Grant Nos.2016YFA0300504 and 2017YFA0302904),the National Natural Science Foundation of China(Grant Nos.11474357 and 11774419),the Fundamental Research Funds for the Central Universities,China,and the Research Funds of Renmin University of China(Grant No.14XNLQ03)
分类号: O731
页码: 230-235
总页数: 6
文件大小: 1002K
下载量: 29
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