Room-temperature ferroelectric p-wave magnet
Abstract
P -wave magnets exhibit odd-parity spin polarization in momentum space while retaining zero net magnetization, offering a promising route toward nonrelativistic spintronics. Previously reported p-wave magnets based on combined time-reversal and lattice-translation symmetry, Tt, have thus far exhibited ordering temperatures below the liquid-nitrogen range. Here, we demonstrate a distinct route to a pristine p-wave magnetism that does not require T t symmetry, and instead is based on incommensurate spin-spiral order. Specifically, the cycloidal magnetic structure of the multiferroic BiFeO3 (BFO) intrinsically realizes p-wave magnetism coexisting with ferroelectric polarization at room temperature. Combining symmetry analysis, density-functional-theory calculations, and circular photogalvanic-effect (CPGE) measurements, we find a large nonrelativistic spin splitting of approximately 100 meV associated with the cycloidal order. The resulting p-wave spin polarization gives rise to a characteristic CPGE response whose sign can be reversibly switched by electrically controlling the cycloid chirality. Our results establish ferroelectric BiFeO3 as a room-temperature platform for electrically switchable p-wave magnetism and provide a route toward voltage-controlled spintronic devices based on parity-breaking magnetic order.
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BibTeX
@misc{shen2026roomtemperature,
title = {{Room-temperature ferroelectric p-wave magnet}},
author = {Kaiwen Shen and Nicoly Hembeck and Warlley H. Campos and Jianting Dong and Bin Li and Yuhang Li and Gui Wang and Jan Priessnitz and Yifan Gao and Yingfen Wei and Hao Jiang and Xumeng Zhang and Ming Wang and Jia Zhang and Wu Shi and Qi Liu and Libor Šmejkal and Xianzhe Chen and Ming Liu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12892},
eprint = {2610.12892},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12892},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Room-temperature ferroelectric p-wave magnet
AU - Kaiwen Shen
AU - Nicoly Hembeck
AU - Warlley H. Campos
AU - Jianting Dong
AU - Bin Li
AU - Yuhang Li
AU - Gui Wang
AU - Jan Priessnitz
AU - Yifan Gao
AU - Yingfen Wei
AU - Hao Jiang
AU - Xumeng Zhang
AU - Ming Wang
AU - Jia Zhang
AU - Wu Shi
AU - Qi Liu
AU - Libor Šmejkal
AU - Xianzhe Chen
AU - Ming Liu
PY - 2026
DA - 2026/10/09
PB - arXiv
DO - 10.48550/arxiv.2610.12892
UR - https://arxiv.org/abs/2610.12892
AB - P -wave magnets exhibit odd-parity spin polarization in momentum space while retaining zero net magnetization, offering a promising route toward nonrelativistic spintronics. Previously reported p-wave magnets based on combined time-reversal and lattice-translation symmetry, Tt, have thus far exhibited ordering temperatures below the liquid-nitrogen range. Here, we demonstrate a distinct route to a pristine p-wave magnetism that does not require T t symmetry, and instead is based on incommensurate spin-spiral order. Specifically, the cycloidal magnetic structure of the multiferroic BiFeO3 (BFO) intrinsically realizes p-wave magnetism coexisting with ferroelectric polarization at room temperature. Combining symmetry analysis, density-functional-theory calculations, and circular photogalvanic-effect (CPGE) measurements, we find a large nonrelativistic spin splitting of approximately 100 meV associated with the cycloidal order. The resulting p-wave spin polarization gives rise to a characteristic CPGE response whose sign can be reversibly switched by electrically controlling the cycloid chirality. Our results establish ferroelectric BiFeO3 as a room-temperature platform for electrically switchable p-wave magnetism and provide a route toward voltage-controlled spintronic devices based on parity-breaking magnetic order.
ER -