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Spin-exciton coupling modified by interfacial magnetic interactions in a van der Waals heterostructure

Lan, Weican ; Liu, Chaocheng ; Feng, Yajuan ; Liu, Ruiqi ; Chu, Yafei ; Cheng, Lu ; Wang, Chao ; Wang, Huijuan ; Fan, Minghui and Zhang, Zixun , et al. (2026) In Nature Communications 17(1).
Abstract

Excitons are primary elementary excitations in solids that present both fundamental interest and technological importance, showing great potential for photospintronic and quantum transduction applications. The emerging coherent collective excitations in two-dimensional antiferromagnetic semiconductors raise prospects for spin-exciton interactions and multifield control schemes. However, realizing the arbitrary manipulation of excitonic quantum states, while preserving the inherent dynamic and response advantages of antiferromagnetic nature remains challenging. Here we achieve bidirectional modulation of the CrSBr exciton energy via interfacial interaction-modified spin-exciton coupling in a CrSBr/Fe3GaTe2... (More)

Excitons are primary elementary excitations in solids that present both fundamental interest and technological importance, showing great potential for photospintronic and quantum transduction applications. The emerging coherent collective excitations in two-dimensional antiferromagnetic semiconductors raise prospects for spin-exciton interactions and multifield control schemes. However, realizing the arbitrary manipulation of excitonic quantum states, while preserving the inherent dynamic and response advantages of antiferromagnetic nature remains challenging. Here we achieve bidirectional modulation of the CrSBr exciton energy via interfacial interaction-modified spin-exciton coupling in a CrSBr/Fe3GaTe2 heterostructure. Compared with pristine CrSBr, the photoluminescence peaks in the heterostructure can exhibit blueshift and redshift corresponding to 6.1% and 8.6% of the total bandwidth, respectively. We reveal that the interfacial charge-transfer-driven magnetic coupling in the heterostructure effectively enhances the magnetic anisotropy and the exchange interaction of CrSBr, thereby stabilizing its antiferromagnetic spin configuration, suppressing interlayer electron-hole recombination, and ultimately leading to an anomalous blueshift of the exciton emission. Our findings demonstrate an approach for bidirectionally modulating exciton energy in two-dimensional antiferromagnetic semiconductors, which provides substantial flexibility in device design and offers an avenue for potential wavelength control in quantum information and optoelectronic technologies.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
17
issue
1
article number
2551
publisher
Nature Publishing Group
external identifiers
  • scopus:105033470255
  • pmid:41663423
ISSN
2041-1723
DOI
10.1038/s41467-026-69389-x
language
English
LU publication?
yes
id
bf3cef0d-4000-45e3-b3c0-e0be74618c9f
date added to LUP
2026-04-21 11:41:30
date last changed
2026-07-30 01:04:00
@article{bf3cef0d-4000-45e3-b3c0-e0be74618c9f,
  abstract     = {{<p>Excitons are primary elementary excitations in solids that present both fundamental interest and technological importance, showing great potential for photospintronic and quantum transduction applications. The emerging coherent collective excitations in two-dimensional antiferromagnetic semiconductors raise prospects for spin-exciton interactions and multifield control schemes. However, realizing the arbitrary manipulation of excitonic quantum states, while preserving the inherent dynamic and response advantages of antiferromagnetic nature remains challenging. Here we achieve bidirectional modulation of the CrSBr exciton energy via interfacial interaction-modified spin-exciton coupling in a CrSBr/Fe<sub>3</sub>GaTe<sub>2</sub> heterostructure. Compared with pristine CrSBr, the photoluminescence peaks in the heterostructure can exhibit blueshift and redshift corresponding to 6.1% and 8.6% of the total bandwidth, respectively. We reveal that the interfacial charge-transfer-driven magnetic coupling in the heterostructure effectively enhances the magnetic anisotropy and the exchange interaction of CrSBr, thereby stabilizing its antiferromagnetic spin configuration, suppressing interlayer electron-hole recombination, and ultimately leading to an anomalous blueshift of the exciton emission. Our findings demonstrate an approach for bidirectionally modulating exciton energy in two-dimensional antiferromagnetic semiconductors, which provides substantial flexibility in device design and offers an avenue for potential wavelength control in quantum information and optoelectronic technologies.</p>}},
  author       = {{Lan, Weican and Liu, Chaocheng and Feng, Yajuan and Liu, Ruiqi and Chu, Yafei and Cheng, Lu and Wang, Chao and Wang, Huijuan and Fan, Minghui and Zhang, Zixun and Niu, Yuran and Lin, Jheng Cyuan and Maccherozzi, Francesco and Duan, Hengli and Yan, Wensheng}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Spin-exciton coupling modified by interfacial magnetic interactions in a van der Waals heterostructure}},
  url          = {{http://dx.doi.org/10.1038/s41467-026-69389-x}},
  doi          = {{10.1038/s41467-026-69389-x}},
  volume       = {{17}},
  year         = {{2026}},
}