Multipiezo effect in altermagnetic V2SeTeO monolayer

TL;DR

This paper predicts a stable antiferromagnetic Janus monolayer V2SeTeO exhibiting a multi-piezo effect, including piezoelectricity, piezovalley, and piezomagnetism, with enhanced valley polarization and magnetization under strain, promising for nanoelectronic applications.

Contribution

It introduces a novel V2SeTeO Janus monolayer with altermagnetic order and multi-piezo effects, expanding the understanding of strain-tunable properties in 2D materials.

Findings

V2SeTeO exhibits a large piezoelectric coefficient of e31 (0.322×10^-10 C/m).

Strain enhances valley polarization and net magnetization beyond V2Se2O.

The material shows potential for applications in nanoelectronics, optoelectronics, spintronics, and valleytronics.

Abstract

Inspired by recent theoretical proposal on the interesting piezomagnetism and C-paired valley polarization in V2Se2O monolayer, we predict a stable antiferromagnetic Janus monolayer V2SeTeO with altermagnetic configuration using density functional theory calculations. It exhibits a novel multi-piezo effect combining piezoelectric, piezovalley and piezomagnetism. Most interestingly, the valley polarization and the net magnetization under strain in V2SeTeO exceed these in V2Se2O, along with the additional large piezoelectric coefficient of e31 (0.322*10-10 C m-1). The multi-piezo effect makes antiferromagnetic Janus monolayer V2SeTeO a tantalizing material for potential applications in nanoelectronics, optoelectronics, spintronics and valleytronics.