Ferromagnetic van der Waals Crystal VI 3

We report structural properties, physical properties, and the electronic structure of van der Waals (vdW) crystal VI . Detailed analysis reveals that VI exhibits a structural transition from monoclinic C2/ m to rhombohedral R3̅ at T ≈ 79 K, similar to CrX (X = Cl, Br, I). Below T , a long-range ferr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Chemical Society 2019-04, Vol.141 (13), p.5326-5333
Main Authors: Tian, Shangjie, Zhang, Jian-Feng, Li, Chenghe, Ying, Tianping, Li, Shiyan, Zhang, Xiao, Liu, Kai, Lei, Hechang
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report structural properties, physical properties, and the electronic structure of van der Waals (vdW) crystal VI . Detailed analysis reveals that VI exhibits a structural transition from monoclinic C2/ m to rhombohedral R3̅ at T ≈ 79 K, similar to CrX (X = Cl, Br, I). Below T , a long-range ferromagnetic (FM) transition emerges at T ≈ 50 K. The local moment of V in VI is close to the high-spin state V ion ( S = 1). Theoretical calculations suggest that VI may be a Mott insulator with a band gap of about 0.90 eV. In addition, VI has a relatively small interlayer binding energy and can be exfoliated easily down to a few layers experimentally. Therefore, VI is a candidate for two-dimensional FM semiconductors. It also provides a novel platform to explore 2D magnetism and vdW heterostructures in S = 1 system.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.8b13584