Group theory of Raman effect in magnetic materials
Abstract
Despite the wealth of experimental observations on Raman scattering in magnetic materials, the underlying selection rules have remained largely unexplored. In this work, we use Onsager reciprocity relation, other than the conventional corepresentation method, to deal with the mathematical structures of Raman tensors in magnetic groups. Using this approach, we generate Raman tensor tables for all magnetic point groups, and present a comprehensive understanding of the Raman selection rules in magnetic materials with direct product representations method. Our theoretical and numerical results match previous experiments well, and resolve a recent puzzle in the Raman spectroscopy of CrSBr. Moreover, we identify a common but overlooked phenomenon: the magneto-Raman vector can be orthogonal to the magnetic moment direction. Our method and associated Raman tensor tables will be helpful for the Raman studies in both experimental and theoretical domains.
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BibTeX
@misc{xiao2026group,
title = {{Group theory of Raman effect in magnetic materials}},
author = {Rui-Chun Xiao and Xue Liu and Yuxuan Jiang and Hang Zhou and Zi-Hao Feng and Jie Hou and Xiangru Kong and Yujun Zhang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2606.09339},
eprint = {2606.09339},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.09339},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Group theory of Raman effect in magnetic materials
AU - Rui-Chun Xiao
AU - Xue Liu
AU - Yuxuan Jiang
AU - Hang Zhou
AU - Zi-Hao Feng
AU - Jie Hou
AU - Xiangru Kong
AU - Yujun Zhang
PY - 2026
DA - 2026/09/04
PB - arXiv
DO - 10.48550/arxiv.2606.09339
UR - https://arxiv.org/abs/2606.09339
AB - Despite the wealth of experimental observations on Raman scattering in magnetic materials, the underlying selection rules have remained largely unexplored. In this work, we use Onsager reciprocity relation, other than the conventional corepresentation method, to deal with the mathematical structures of Raman tensors in magnetic groups. Using this approach, we generate Raman tensor tables for all magnetic point groups, and present a comprehensive understanding of the Raman selection rules in magnetic materials with direct product representations method. Our theoretical and numerical results match previous experiments well, and resolve a recent puzzle in the Raman spectroscopy of CrSBr. Moreover, we identify a common but overlooked phenomenon: the magneto-Raman vector can be orthogonal to the magnetic moment direction. Our method and associated Raman tensor tables will be helpful for the Raman studies in both experimental and theoretical domains.
ER -