Deterministic control of antiferromagnetic domain walls by circular phonons
Abstract
In an antiferromagnet, areas with different orientations of the antiferromagnetic Néel vector, which plays the role of the order parameter, can coexist, thus forming antiferromagnetic domains separated by domain walls. This suggests that antiferromagnets can possess the functionalities of magnetic storage media. Whether one can benefit from these functionalities crucially depends on the availability of efficient means for deterministic control of antiferromagnetic domain walls. Here, we demonstrate an approach to deterministically control domain walls in the van der Waals antiferromagnet Ni-doped MnPS3 via dynamic engineering of the crystal lattice. By resonantly exciting a pair of nearly degenerate orthogonal infrared-active Au and Bu phonon modes with circularly polarized mid-infrared light, we induce helicity-dependent reconfiguration of 180° antiferromagnetic domains, providing evidence for a phonon-induced effective field conjugate to the Néel order parameter. The domain kinetics exhibit a pronounced helicity asymmetry governed by the interplay between domain-wall elasticity and defect-mediated pinning, enabling small phonon-driven perturbations to accumulate into stable domain transformations. Our results establish dynamic lattice control and defect engineering as means for deterministic control of antiferromagnetic order.
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BibTeX
@misc{bilyk2026deterministic,
title = {{Deterministic control of antiferromagnetic domain walls by circular phonons}},
author = {Vladislav Bilyk and Nikolai Khokhlov and Viktoriia Radovskaia and Peter Kim and Pietro Diona and Ravi Kaushik and Luca Maranzana and Takeshi Hayashida and Sergey Artyukhin and Edwin Hang Tong Teo and Apoorva Chaturvedi and Carl S. Davies and Andrei Kirilyuk and Alexey Kimel and Dmytro Afanasiev},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.23563},
eprint = {2609.23563},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.23563},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Deterministic control of antiferromagnetic domain walls by circular phonons
AU - Vladislav Bilyk
AU - Nikolai Khokhlov
AU - Viktoriia Radovskaia
AU - Peter Kim
AU - Pietro Diona
AU - Ravi Kaushik
AU - Luca Maranzana
AU - Takeshi Hayashida
AU - Sergey Artyukhin
AU - Edwin Hang Tong Teo
AU - Apoorva Chaturvedi
AU - Carl S. Davies
AU - Andrei Kirilyuk
AU - Alexey Kimel
AU - Dmytro Afanasiev
PY - 2026
DA - 2026/09/20
PB - arXiv
DO - 10.48550/arxiv.2609.23563
UR - https://arxiv.org/abs/2609.23563
AB - In an antiferromagnet, areas with different orientations of the antiferromagnetic Néel vector, which plays the role of the order parameter, can coexist, thus forming antiferromagnetic domains separated by domain walls. This suggests that antiferromagnets can possess the functionalities of magnetic storage media. Whether one can benefit from these functionalities crucially depends on the availability of efficient means for deterministic control of antiferromagnetic domain walls. Here, we demonstrate an approach to deterministically control domain walls in the van der Waals antiferromagnet Ni-doped MnPS_3 via dynamic engineering of the crystal lattice. By resonantly exciting a pair of nearly degenerate orthogonal infrared-active A_u and B_u phonon modes with circularly polarized mid-infrared light, we induce helicity-dependent reconfiguration of 180° antiferromagnetic domains, providing evidence for a phonon-induced effective field conjugate to the Néel order parameter. The domain kinetics exhibit a pronounced helicity asymmetry governed by the interplay between domain-wall elasticity and defect-mediated pinning, enabling small phonon-driven perturbations to accumulate into stable domain transformations. Our results establish dynamic lattice control and defect engineering as means for deterministic control of antiferromagnetic order.
ER -