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Probing the Néel-Type Antiferromagnetic Order and Coherent Magnon–Exciton Coupling in Van Der Waals VPS3

Liu, Chaocheng ; Li, Zhi ; Hu, Jiyu ; Duan, Hengli ; Wang, Chao ; Cai, Liang ; Feng, Sihua ; Wang, Yao ; Liu, Ruiqi and Hou, De , et al. (2023) In Advanced Materials 35(30).
Abstract

2D van der Waals (vdW) antiferromagnets have received intensive attention due to their terahertz resonance, multilevel magnetic-order states, and ultrafast spin dynamics. However, accurately identifying their magnetic configuration still remains a challenge owing to the lack of net magnetization and insensitivity to external fields. In this work, the Néel-type antiferromagnetic (AFM) order in 2D antiferromagnet VPS3 with the out-of-plane anisotropy, which is demonstrated by the temperature-dependent spin–phonon coupling and second-harmonic generation (SHG), is experimentally probed. This long-range AFM order even persists at the ultrathin limit. Furthermore, strong interlayer exciton–magnon coupling (EMC) upon the Néel-type... (More)

2D van der Waals (vdW) antiferromagnets have received intensive attention due to their terahertz resonance, multilevel magnetic-order states, and ultrafast spin dynamics. However, accurately identifying their magnetic configuration still remains a challenge owing to the lack of net magnetization and insensitivity to external fields. In this work, the Néel-type antiferromagnetic (AFM) order in 2D antiferromagnet VPS3 with the out-of-plane anisotropy, which is demonstrated by the temperature-dependent spin–phonon coupling and second-harmonic generation (SHG), is experimentally probed. This long-range AFM order even persists at the ultrathin limit. Furthermore, strong interlayer exciton–magnon coupling (EMC) upon the Néel-type AFM order is detected based on the monolayer WSe2/VPS3 heterostructure, which induces an enhanced excitonic state and further certifies the Néel-type AFM order of VPS3. The discovery provides optical routes as the novel platform to study 2D antiferromagnets and promotes their potential applications in magneto-optics and opto-spintronic devices.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
2D antiferromagnets, exciton–magnon coupling, Néel-type AFM order, second-harmonic generation, spin–phonon coupling
in
Advanced Materials
volume
35
issue
30
article number
2300247
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:37071057
  • scopus:85161382454
ISSN
0935-9648
DOI
10.1002/adma.202300247
language
English
LU publication?
yes
id
5840c2ab-ac1e-4ef1-956a-98111af39786
date added to LUP
2023-08-28 14:19:43
date last changed
2024-04-20 03:08:28
@article{5840c2ab-ac1e-4ef1-956a-98111af39786,
  abstract     = {{<p>2D van der Waals (vdW) antiferromagnets have received intensive attention due to their terahertz resonance, multilevel magnetic-order states, and ultrafast spin dynamics. However, accurately identifying their magnetic configuration still remains a challenge owing to the lack of net magnetization and insensitivity to external fields. In this work, the Néel-type antiferromagnetic (AFM) order in 2D antiferromagnet VPS<sub>3</sub> with the out-of-plane anisotropy, which is demonstrated by the temperature-dependent spin–phonon coupling and second-harmonic generation (SHG), is experimentally probed. This long-range AFM order even persists at the ultrathin limit. Furthermore, strong interlayer exciton–magnon coupling (EMC) upon the Néel-type AFM order is detected based on the monolayer WSe<sub>2</sub>/VPS<sub>3</sub> heterostructure, which induces an enhanced excitonic state and further certifies the Néel-type AFM order of VPS<sub>3</sub>. The discovery provides optical routes as the novel platform to study 2D antiferromagnets and promotes their potential applications in magneto-optics and opto-spintronic devices.</p>}},
  author       = {{Liu, Chaocheng and Li, Zhi and Hu, Jiyu and Duan, Hengli and Wang, Chao and Cai, Liang and Feng, Sihua and Wang, Yao and Liu, Ruiqi and Hou, De and Liu, Caixing and Zhang, Ranran and Zhu, Lin and Niu, Yuran and Zakharov, Alexei A. and Sheng, Zhigao and Yan, Wensheng}},
  issn         = {{0935-9648}},
  keywords     = {{2D antiferromagnets; exciton–magnon coupling; Néel-type AFM order; second-harmonic generation; spin–phonon coupling}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{30}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Materials}},
  title        = {{Probing the Néel-Type Antiferromagnetic Order and Coherent Magnon–Exciton Coupling in Van Der Waals VPS<sub>3</sub>}},
  url          = {{http://dx.doi.org/10.1002/adma.202300247}},
  doi          = {{10.1002/adma.202300247}},
  volume       = {{35}},
  year         = {{2023}},
}