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

Caixing Liu, Zhi Li, Jiyu Hu, Hengli Duan*, Chao Wang, Liang Cai, Sihua Feng, Yao Wang, Ruiqi Liu, De Hou, Caixing Liu, Ranran Zhang, Lin Zhu, Yuran Niu, Alexei A. Zakharov, Zhigao Sheng*, Wensheng Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

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 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.

Original languageEnglish (US)
Article number2300247
JournalAdvanced Materials
Volume35
Issue number30
DOIs
StatePublished - Jul 27 2023

Bibliographical note

Funding Information:
This work was financially supported by the National Key Research and Development Program of China (2021YFA1600800), National Natural Science Foundation of China (grants no. 11975234, U2032150, 12075243, 12005227, 12105286, 121350122 and 12275271), Natural Science Foundation of Anhui Province (2208085QA14), Major Science and Technology Project of Anhui Province (202103a05020025), the Key Program of Research and Development of Hefei Science Center CAS (2021HSC‐KPRD002, 2022HSC‐KPRD003), the Users with Excellence Program of Hefei Science Center CAS (no. 2020HSC‐UE002, 2020HSC‐CIP013, 2021HSC‐UE002, 2021HSC‐UE003), Collaborative Innovation Program of Hefei Science Center CAS (2022HSC‐CIP028), the Fundamental Research Funds for the Central Universities (WK 2310000103), and partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication. The authors acknowledge MAX IV Laboratory for time on MAXPEEM Beamline under Proposal [20210784]. Research conducted at MAX IV, a Swedish national user facility, was supported by the Swedish Research council under contract 2018–07152, the Swedish Governmental Agency for Innovation Systems under contract 2018–04969, and Formas under contract 2019–02496.

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • 2D antiferromagnets
  • exciton–magnon coupling
  • Néel-type AFM order
  • second-harmonic generation
  • spin–phonon coupling

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Probing the Néel-Type Antiferromagnetic Order and Coherent Magnon–Exciton Coupling in Van Der Waals VPS3'. Together they form a unique fingerprint.

Cite this