Bicircular light tunable topological phases and nonlinear Hall responses in odd-parity magnets
Abstract
Altermagnets are an emerging class of magnetic materials that exhibit characteristic features of both ferromagnets and antiferromagnets. Odd-wave magnets, where the momentum-dependent spin splitting follows an odd-parity form factor, provide a distinct platform for exploring unconventional magnetic and topological phenomena. In this work, we demonstrate light-induced topological phase transitions in odd-parity magnets driven by bicircular light. We show that a cascade of topological phase transitions occur as the relative amplitude ratio of the two beams is varied. These are accompanied by sharp changes of the quantum metric. We demonstrate that bicircular light unlocks nonlinear Hall responses arising from Berry curvature and quantum metric in irradiated odd-wave magnets, and formulate the underlying selection rules. Our results show that both the topology and the nonlinear responses in odd-parity magnets can be directly controlled by a bicircular drive.
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BibTeX
@misc{reja2026bicircular,
title = {{Bicircular light tunable topological phases and nonlinear Hall responses in odd-parity magnets}},
author = {Md Afsar Reja and Awadhesh Narayan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.26163},
eprint = {2610.26163},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.26163},
}
RIS
TY - UNPB
TI - Bicircular light tunable topological phases and nonlinear Hall responses in odd-parity magnets
AU - Md Afsar Reja
AU - Awadhesh Narayan
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.26163
UR - https://arxiv.org/abs/2610.26163
AB - Altermagnets are an emerging class of magnetic materials that exhibit characteristic features of both ferromagnets and antiferromagnets. Odd-wave magnets, where the momentum-dependent spin splitting follows an odd-parity form factor, provide a distinct platform for exploring unconventional magnetic and topological phenomena. In this work, we demonstrate light-induced topological phase transitions in odd-parity magnets driven by bicircular light. We show that a cascade of topological phase transitions occur as the relative amplitude ratio of the two beams is varied. These are accompanied by sharp changes of the quantum metric. We demonstrate that bicircular light unlocks nonlinear Hall responses arising from Berry curvature and quantum metric in irradiated odd-wave magnets, and formulate the underlying selection rules. Our results show that both the topology and the nonlinear responses in odd-parity magnets can be directly controlled by a bicircular drive.
ER -