Raman scattering study of magnetic layered MPS_3 crystals(M = Mn, Fe, Ni)

作     者：Yi-Meng Wang Jian-Feng Zhang Cheng-He Li Xiao-Li Ma Jian-Ting Ji Feng Jin He-Chang Lei Kai Liu Wei-Lu Zhang Qing-Ming Zhang 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

作者机构：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 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第5期

页      面：226-231页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

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) 

主　　题：Raman scattering two-dimensional magnetic van der Waals materials lattice dynamics magnetism 

摘      要：We report a comprehensive Raman scattering study on layered MPS_3(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 C_(2h)but can be simplified to D_(3d) 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 MPS_3. Our results reveal that the in-plane Nel antiferromagnetic(AF) order in MnPS_3 favors a spin–phonon coupling compared to the in-plane zig-zag AF in NiPS_3 and FePS_3. 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 MPX_3(M = transition metal, X = S, Se) family and shed light on the magnetism of monolayer MPX_3 materials.