Two-Dimensional Ferromagnetic Half-Metallic Janus V2AsP Monolayer

TL;DR

This paper reports a stable 2D Janus V2AsP monolayer exhibiting ferromagnetic half-metallicity with a significant gap, tunable magnetic properties under strain, and potential for spintronic device applications.

Contribution

The study introduces a novel 2D Janus V2AsP monolayer with unique ferromagnetic half-metallic properties and strain-tunable magnetic phase transitions, expanding the material options for spintronics.

Findings

Demonstrates ferromagnetic half-metallicity with a 0.38 eV gap.

Tensile strain induces a phase transition from ferromagnetic to antiferromagnetic.

Curie temperature increases with compressive strain.

Abstract

Two-dimensional (2D) ferromagnetic materials present promising candidates for spintronic devices, and the half-metallic materials with 100% spin polarization at Fermi energy level are highly desired for many spin-based devices. 2D Janus materials have attracted great attention in recent years due to their excellent properties induced by breaking the symmetry. Here, using the density functional theory, we report that the Janus V2AsP monolayer demonstrates a charming ferromagnetic half-metallic feature. It is dynamically stable in view of the absence of imaginary frequency phonon. The half-metallic gap is about 0.38 eV and the spin splitting of about 1.34eV for the V2AsP monolayer. Interestingly, a tensile strain of 4.9% can induce it to undergo a phase transition from ferromagnetic to anti-ferromagnetic state. Moreover, the Curie temperature (Tc) enhances with the increase of compressive strain. All there appealing properties make the half-metallic Janus V2AsP monolayer a promising material for 2D spintronic applications.