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Peer-reviewedCC BY 4.0Nature Communications

Colossal magnetic tunability of excitons in 2D van der Waals magnetic semiconductor CrSBr

  • Rafał Komar1
  • M. Goryca2
  • A. Łopion3
  • Miłosz Rybak4
  • Tomasz Woźniak4,5
  • Mateusz Raczyński1
  • Karol M. Gała̧zka5
  • Kseniia Mosina6
  • Aljoscha Söll6
  • Zdeněk Sofer6
  • W. Pacuski1
  • C. Faugeras7
3 more authors
  • Magdalena Birowska5
  • P. Kossacki8
  • T. Kazimierczuk1
8 affiliations
  1. 1Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
  2. 2Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland. [email protected]
  3. 3Institute of Physics, University of Muenster, Muenster, Germany
  4. 4Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wrocław, Poland
  5. 5Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
  6. 6Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Prague, Czech Republic
  7. 7LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, Grenoble, France
  8. 8Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland. [email protected]
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Abstract

2D magnetic semiconductors, which intrinsically couple a rich landscape of magnetic orders with tightly bound electron-hole pairs (excitons), present an exciting platform to investigate the interplay between optical and magnetic phenomena at the atomic scale. In such systems, the strength of magneto-optical effects determines how deeply the magnetic properties can be revealed. Here, we report the observation of remarkably strong magneto-optical effects in the 2D magnetic semiconductor CrSBr that allow probing its magnetic order with unprecedented sensitivity. By investigating optical transitions above the fundamental exciton energy, we discover massive spectral red- and blueshifts approaching 100 meV under applied magnetic fields – an order of magnitude larger than previously observed magneto-excitonic responses. Our comprehensive magneto-optical experiments, accompanied by detailed DFT calculations, indicate the possible origin of the transitions exhibiting such intriguing behavior. These findings open avenues for exploiting magneto-optical phenomena in newly accessible regimes, enabling novel opto-spintronic applications previously limited by weak magnetic responses.

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Cite

BibTeXRIS
BibTeX
@article{komar2026colossal,
  title = {{Colossal magnetic tunability of excitons in 2D van der Waals magnetic semiconductor CrSBr}},
  author = {Rafał Komar and M. Goryca and A. Łopion and Miłosz Rybak and Tomasz Woźniak and Mateusz Raczyński and Karol M. Gała̧zka and Kseniia Mosina and Aljoscha Söll and Zdeněk Sofer and W. Pacuski and C. Faugeras and Magdalena Birowska and P. Kossacki and T. Kazimierczuk},
  journal = {Nature Communications},
  year = {2026},
  month = sep,
  doi = {10.1038/s41467-026-77986-z},
  url = {https://doi.org/10.1038/s41467-026-77986-z},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Colossal magnetic tunability of excitons in 2D van der Waals magnetic semiconductor CrSBr
AU  - Rafał Komar
AU  - M. Goryca
AU  - A. Łopion
AU  - Miłosz Rybak
AU  - Tomasz Woźniak
AU  - Mateusz Raczyński
AU  - Karol M. Gała̧zka
AU  - Kseniia Mosina
AU  - Aljoscha Söll
AU  - Zdeněk Sofer
AU  - W. Pacuski
AU  - C. Faugeras
AU  - Magdalena Birowska
AU  - P. Kossacki
AU  - T. Kazimierczuk
PY  - 2026
DA  - 2026/09/24
JO  - Nature Communications
DO  - 10.1038/s41467-026-77986-z
UR  - https://doi.org/10.1038/s41467-026-77986-z
AB  - 2D magnetic semiconductors, which intrinsically couple a rich landscape of magnetic orders with tightly bound electron-hole pairs (excitons), present an exciting platform to investigate the interplay between optical and magnetic phenomena at the atomic scale. In such systems, the strength of magneto-optical effects determines how deeply the magnetic properties can be revealed. Here, we report the observation of remarkably strong magneto-optical effects in the 2D magnetic semiconductor CrSBr that allow probing its magnetic order with unprecedented sensitivity. By investigating optical transitions above the fundamental exciton energy, we discover massive spectral red- and blueshifts approaching 100 meV under applied magnetic fields – an order of magnitude larger than previously observed magneto-excitonic responses. Our comprehensive magneto-optical experiments, accompanied by detailed DFT calculations, indicate the possible origin of the transitions exhibiting such intriguing behavior. These findings open avenues for exploiting magneto-optical phenomena in newly accessible regimes, enabling novel opto-spintronic applications previously limited by weak magnetic responses.
SN  - 2041-1723
ER  -