Properties of Monolayer Vanadium Dichalcogenides grown by molecular beam epitaxy*

Ferromagnetic ordering in monolayer vanadium dichalcogenides was predicted by DFT, despite the lack of ferromagnetic ordering in its bulk form. Ferromagnetic 2D materials with high Curie temperatures are highly sought to enable spintronic devices based on van der Waals heterostructures. In this talk we present a discussion of VSe₂ and VTe₂ monolayers grown by molecular beam epitaxy and study the difference of their monolayer properties compared to the bulk. In addition, to charge order states and structural variations of the monolayer and the bulk, we critically assess the origin of the measured ferromagnetic properties [1] in (sub)monolayer VSe₂.
[1] M. Bonilla et al. ‘Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates’ Nat. Nanotechnol. 13, 289-203 (2018).