Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS <sub>4</sub>

We investigate the near-infrared optical response of the semiconducting van der Waals antiferromagnet CrPS 4 and identify previously unreported spin-entangled optical resonances. The strong and anisotropic magnetic-field dependence of these resonances reflects the underlying magnetic order and confirms the biaxial antiferromagnetic nature of CrPS 4 . From the magnetic field evolution of the optical transition, we extract key magnetic parameters, including the spin-flop ( ≈ 0.9 T) and spin-saturation ( ≈ 8 T) fields. These results demonstrate a potential pathway for all-optical probing of spin states in van der Waals antiferromagnets, with relevance for spin-sensitive optoelectronic and magneto-optical devices.

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Publication Details

Journal
Nano Letters
Published
2026-06-13
DOI
https://doi.org/10.1021/acs.nanolett.6c01101
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
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article

Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS 4

Dipankar Jana, M. Orlita, Maciej Koperski, Zdeněk Sofer et al.
Nano Letters
2D Materials and Applications
article

Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS 4

Dipankar Jana, M. Orlita, Maciej Koperski, Zdeněk Sofer, C. Faugeras, Aljoscha Söll, M. Potemski
article en

Abstract

We investigate the near-infrared optical response of the semiconducting van der Waals antiferromagnet CrPS 4 and identify previously unreported spin-entangled optical resonances. The strong and anisotropic magnetic-field dependence of these resonances reflects the underlying magnetic order and confirms the biaxial antiferromagnetic nature of CrPS 4 . From the magnetic field evolution of the optical transition, we extract key magnetic parameters, including the spin-flop ( ≈ 0.9 T) and spin-saturation ( ≈ 8 T) fields. These results demonstrate a potential pathway for all-optical probing of spin states in van der Waals antiferromagnets, with relevance for spin-sensitive optoelectronic and magneto-optical devices.

Nano Letters
Warsaw University of Technology (PL), Centre National de la Recherche Scientifique (FR), National University of Singapore (SG), Université Fédérale de Toulouse Midi-Pyrénées (FR), Institut National des Sciences Appliquées de Toulouse (FR), Charles University (CZ), California Earthquake Authority (US), Laboratoire National des Champs Magnétiques Intenses (FR), Institute of Molecular Functional Materials (CN), Division of Chemistry (US), FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ), University of Warsaw (PL), Université Grenoble Alpes (FR), University of Chemistry and Technology, Prague (CZ)
Openalex Percentile: Top 13%
2D Materials and Applications
DOISourceOpenAlex
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Spin-Flip Optical Excitations in van der Waals Antiferromagnet CrPS <sub>4</sub> — Dipankar Jana, M. Orlita, et al. · Nano Letters (2026) | TGRS Research Map | TGRS