Modulation of Metal and Insulator States in 2D Ferromagnetic VS₂ by van der Waals Interaction Engineering

Abstract

2D transition-metal dichalcogenides (TMDCs) are currently the key to the development of nanoelectronics. However, TMDCs are predominantly nonmagnetic, greatly hindering the advancement of their spintronic applications. Here, an experimental realization of intrinsic magnetic ordering in a pristine TMDC lattice is reported, bringing a new class of ferromagnetic semiconductors among TMDCs. Through van der Waals (vdW) interaction engineering of 2D vanadium disulfide (VS ), dual regulation of spin properties and bandgap brings about intrinsic ferromagnetism along with a small bandgap, unravelling the decisive role of vdW gaps in determining the electronic states in 2D VS . An overall control of the electronic states of VS is also demonstrated: bond-enlarging triggering a metal-to-semiconductor electronic transition and bond-compression inducing metallization in 2D VS . The pristine VS lattice thus provides a new platform for precise manipulation of both charge and spin degrees of freedom in 2D TMDCs availing spintronic applications.

Degradable Vanadium Disulfide Nanostructures with Unique Optical and Magnetic Functions for Cancer Theranostics

“…[15] As predicted by theoretical investigations,t he existence of intrinsic magnetic ordering in VS 2 may bring anew class of paramagnetic properties. [15] As predicted by theoretical investigations,t he existence of intrinsic magnetic ordering in VS 2 may bring anew class of paramagnetic properties.…”

Sub‐Millimeter‐Scale Monolayer p‐Type H‐Phase VS2

“…VS 2 is a typical member of Group VB TMDs with metal‐insulator transition property and room temperature ferromagnetism. [ 10,11 ] There are two possible phases in VS 2 , that is, T phase and H phase. So far the T phase VS 2 has been widely studied due to its high conductivity, excellent electrocatalytic activity, and ferromagnetism.…”

Degradable Vanadium Disulfide Nanostructures with Unique Optical and Magnetic Functions for Cancer Theranostics

“…Due to the 3d 1 electronic configuration of quadrivalent vanadium (V) as well as the strong electron coupling, collective electronic responses such as charge density wave order would be allowed. [15] As predicted by theoretical investigations,t he existence of intrinsic magnetic ordering in VS 2 may bring anew class of paramagnetic properties. [15,16] Therefore,w ew ondered whether our VS 2 @lipid-PEG nanoparticles would show contrast for MR imaging.T he T1weighted MR images showed ab rightening effect as the Figure 1.…”

“…[15] As predicted by theoretical investigations,t he existence of intrinsic magnetic ordering in VS 2 may bring anew class of paramagnetic properties. [15,16] Therefore,w ew ondered whether our VS 2 @lipid-PEG nanoparticles would show contrast for MR imaging.T he T1weighted MR images showed ab rightening effect as the Figure 1. Synthesis and characterization of VS 2 @lipid-PEG nanoparticles.…”