Photoinduced Odd- and Mixed-Parity Magnetism in Collinear Antiferromagnets

@misc{li2026photoinduced,
  title = {{Photoinduced Odd- and Mixed-Parity Magnetism in Collinear Antiferromagnets}},
  author = {Jin-Yang Li and Ruo-Yu Ning and Ying Zhang and Qiu-Qiu Li and Si Li and Wen-Li Yang},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.11807},
  eprint = {2610.11807},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.11807},
}

TY  - UNPB
TI  - Photoinduced Odd- and Mixed-Parity Magnetism in Collinear Antiferromagnets
AU  - Jin-Yang Li
AU  - Ruo-Yu Ning
AU  - Ying Zhang
AU  - Qiu-Qiu Li
AU  - Si Li
AU  - Wen-Li Yang
PY  - 2026
DA  - 2026/10/21
PB  - arXiv
DO  - 10.48550/arxiv.2610.11807
UR  - https://arxiv.org/abs/2610.11807
AB  - Altermagnetism, characterized by compensated collinear magnetic moments and even-parity momentum-dependent spin splitting, has emerged as a distinct form of magnetic order. However, realizing odd- and mixed-parity magnetism in fully compensated collinear magnets remains challenging. Here, we demonstrate light-induced odd- and mixed-parity magnetism in conventional collinear antiferromagnets. Combining Floquet theory with first-principles calculations, we show that circularly polarized light (CPL) induces odd-parity f-wave spin splitting in monolayer CoS and CoSe, whereas elliptically polarized light (EPL) induces p-wave spin splitting. Uniaxial strain combined with CPL offers an alternative route to the p-wave state. Furthermore, combining an electric field with CPL or EPL generates mixed-parity spin splitting. Light-induced breaking of 𝒫𝒯 symmetry, together with spin-orbit coupling, gives rise to a finite anomalous Hall response. Our findings establish a versatile approach to engineering spin splitting and controlling electronic and magnetic properties in compensated antiferromagnets.
ER  -