Probing the Néel‐Type Antiferromagnetic Order and Coherent Magnon–Exciton Coupling in Van Der Waals VPS 3
Year: 2023
Type: article
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 VPS 3 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 2 /VPS 3 heterostructure, which induces an enhanced excitonic state and further certifies the Néel‐type AFM order of VPS 3 . 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.
Source: Advanced Materials
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Funders: National Natural Science Foundation of China, VINNOVA, Svenska Forskningsrådet Formas, Vetenskapsrådet, University of Science and Technology of China, Natural Science Foundation of Anhui Province, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
Awards: G1098388726, G208125138, G2763187269, G317939215, G3187769929, G3407431255, G3728818118, G4303577220, G489162877, G5096929151, MAX IV operations – Formas, G5224014036, G5229471624, G5388483091, G594270511, G6197068518, G712881263, G796383425, G7986836463, MAX IV operations 2019-2021, G8807439618
OpenAlex ID: W4366228676