Magnetic Field-Tunable Repulsive Exciton-Exciton Interaction in the van der Waals Antiferromagnet NiPS3
Abstract
Two ultra-narrow absorption peaks around 1.5 eV, which are widely believed to originate from a transition from a spin-orbital entangled triplet to a singlet state, in the two-dimensional van der Waals crystal NiPS3, have attracted considerable attention because of their pronounced spin-dependent character. An interesting question is whether ultrahigh magnetic fields modify an interaction-driven hybridization between those two peaks. In this work we perform systematic magneto-optical measurements of NiPS3 in pulsed magnetic fields of up to 178 T and observe a pronounced mutual repulsion between the two sharp exciton peaks accompanied by a redistribution of oscillator strength, while the band edge shows no detectable field-induced shift within our experimental resolution. We construct a minimal two-level interaction model and compare it semi-quantitatively with the experimental data. Our results reveal a magnetic-field-tunable exciton-exciton coupling as the dominant high-field response of NiPS3, and clarify this material as a new experimental platform for exploring strongly correlated exciton physics in magnetic van der Waals insulators.
Versions
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BibTeX
@misc{huang2026magnetic,
title = {{Magnetic Field-Tunable Repulsive Exciton-Exciton Interaction in the van der Waals Antiferromagnet NiPS$_3$}},
author = {Kaiyang Huang and Jaena Park and Zhuo Yang and Je-Geun Park and Atsuhiko Miyata and Yoshimitsu Kohama and Yasuhiro H. Matsuda},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.29701},
eprint = {2608.29701},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.29701},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Magnetic Field-Tunable Repulsive Exciton-Exciton Interaction in the van der Waals Antiferromagnet NiPS_3
AU - Kaiyang Huang
AU - Jaena Park
AU - Zhuo Yang
AU - Je-Geun Park
AU - Atsuhiko Miyata
AU - Yoshimitsu Kohama
AU - Yasuhiro H. Matsuda
PY - 2026
DA - 2026/08/30
PB - arXiv
DO - 10.48550/arxiv.2608.29701
UR - https://arxiv.org/abs/2608.29701
AB - Two ultra-narrow absorption peaks around 1.5 eV, which are widely believed to originate from a transition from a spin-orbital entangled triplet to a singlet state, in the two-dimensional van der Waals crystal NiPS_3, have attracted considerable attention because of their pronounced spin-dependent character. An interesting question is whether ultrahigh magnetic fields modify an interaction-driven hybridization between those two peaks. In this work we perform systematic magneto-optical measurements of NiPS_3 in pulsed magnetic fields of up to 178 T and observe a pronounced mutual repulsion between the two sharp exciton peaks accompanied by a redistribution of oscillator strength, while the band edge shows no detectable field-induced shift within our experimental resolution. We construct a minimal two-level interaction model and compare it semi-quantitatively with the experimental data. Our results reveal a magnetic-field-tunable exciton-exciton coupling as the dominant high-field response of NiPS_3, and clarify this material as a new experimental platform for exploring strongly correlated exciton physics in magnetic van der Waals insulators.
ER -