Magnetoelastic Coupling in Hole-doped Two-dimensional \b{eta}-PbO

TL;DR

This paper demonstrates that hole doping in 2D {eta}-PbO induces stable ferromagnetism and ferroelasticity, with tunable properties and coupled spin-lattice interactions, opening new avenues for multifunctional 2D devices.

Contribution

It introduces a novel method of achieving coupled ferromagnetism and ferroelasticity in 2D {eta}-PbO through carrier doping, which was not previously demonstrated.

Findings

Hole doping induces ferromagnetism and ferroelasticity in 2D {eta}-PbO.

The magnetic and ferroelastic properties are tunable by doping levels.

The in-plane magnetization axis is coupled with lattice direction, enabling ferroelastic control of spin.

Abstract

The realization of intertwined ferroelasticity and ferromagnetism in two-dimensional (2D) lattices is of great interest for broad nanoscale applications, but still remains a remarkable challenge. Here, we propose an alternative approach to realize the strongly coupled ferromagnetism and ferroelasticity by carrier doping. We demonstrate that prototypical 2D \b{eta}-PbO is dynamically, thermally and mechanically stable. Under hole doping, 2D \b{eta}-PbO possesses ferromagnetism and ferroelasticity simultaneously. Moreover, the robustness of ferromagnetic and ferroelastic orders are doping tunable. In particular, 2D \b{eta}-PbO features in-plane easy magnetization axis that is coupled with lattice direction, enabling ferroelastic manipulation of spin direction. Our work highlights a new direction for 2D magnetoelastic research and enables the possibility for multifunctional devices.