Observation of Dyakonov-Perel-type magnon spin relaxation in uniaxial antiferromagnetic insulators
Abstract
Long-distance transport of magnon spin currents in antiferromagnetic (AFM) insulators has attracted tremendous attention recently, however, the AFM magnon spin relaxation mechanisms remain elusive. Here, we report that the Dyakonov-Perel-type magnon spin relaxation mechanism governs the spin current transport along the easy axis in two prototypical uniaxial AFM insulators, Cr2O3 and alpha-Fe2O3. First, an over 450% enhancement of the first-harmonic nonlocal signal induced by a magnetic field is observed prior to the spin-flop transition, which can be well-interpreted by our model incorporating Dyakonov-Perel-type magnon spin relaxation. Secondly, we find that the magnon spin diffusion length in both crystals increases with magnetic field and saturates at fields above 0.8 T, consistent with our model. Finally, the temperature dependence of the zero-field magnon spin diffusion length in both AFM insulators can be qualitatively explained through our model. These findings are valuable for the development of low-dissipation antiferromagnetic spintronic devices.
Versions
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BibTeX
@misc{gao2026observation,
title = {{Observation of Dyakonov-Perel-type magnon spin relaxation in uniaxial antiferromagnetic insulators}},
author = {Qinwu Gao and Andi Cong and Bokai Liang and Meng Yang and Jingjing Liu and Lang Chen and Shiwei Wu and Ka Shen and Junxue Li},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.19700},
eprint = {2609.19700},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.19700},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Observation of Dyakonov-Perel-type magnon spin relaxation in uniaxial antiferromagnetic insulators
AU - Qinwu Gao
AU - Andi Cong
AU - Bokai Liang
AU - Meng Yang
AU - Jingjing Liu
AU - Lang Chen
AU - Shiwei Wu
AU - Ka Shen
AU - Junxue Li
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.19700
UR - https://arxiv.org/abs/2609.19700
AB - Long-distance transport of magnon spin currents in antiferromagnetic (AFM) insulators has attracted tremendous attention recently, however, the AFM magnon spin relaxation mechanisms remain elusive. Here, we report that the Dyakonov-Perel-type magnon spin relaxation mechanism governs the spin current transport along the easy axis in two prototypical uniaxial AFM insulators, Cr2O3 and alpha-Fe2O3. First, an over 450% enhancement of the first-harmonic nonlocal signal induced by a magnetic field is observed prior to the spin-flop transition, which can be well-interpreted by our model incorporating Dyakonov-Perel-type magnon spin relaxation. Secondly, we find that the magnon spin diffusion length in both crystals increases with magnetic field and saturates at fields above 0.8 T, consistent with our model. Finally, the temperature dependence of the zero-field magnon spin diffusion length in both AFM insulators can be qualitatively explained through our model. These findings are valuable for the development of low-dissipation antiferromagnetic spintronic devices.
ER -