Long-range anisotropic Heisenberg ferromagnets and electrically tunable ordering

Abstract

Recent realizations of intrinsic magnetic order in truly two-dimensional materials have opened new avenues in the fundamental knowledge and spintronic applications. Here we develop an anisotropic Heisenberg model with relativistic exchange interactions that are obtained from the first-principles calculations. We demonstrate the crucial importance of magnetic interactions beyond the first-neighbour to qualitatively and quantitatively reproduce the experimental results. Once we ascertain the predictive capacity of the model for chromium trihalides and CrGeTe${}_3$, we investigate the feasibility of tuning the magnetic ordering by electrical means in these materials. A remarkable five-fold increase in the ferromagnetic Curie temperature is predicted in monolayer CrI${}_3$ within experimentally obtainable hole density. The elusive microscopic mechanism behind the doping-dependent Curie temperature is illustrated. Further, in the present context, the effects of biaxial strain and chemical doping are also addressed. The results should trigger further experimental attention to test the present conclusions.

11 Pages, 5 figures

References in corpus (13)

• Magnetic 2D materials and heterostructures
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• On the Origin of Zigzag Magnetic Order in Iridium Oxide Na2IrO3
• Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
• Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3
• Evolution of interlayer and intralayer magnetism in three atomically thin chromium trihalides
• Layer-Resolved Magnetic Proximity Effect in van der Waals Heterostructures
• VI3 - a new layered ferromagnetic semiconductor
• Tricritical behavior of two-dimensional intrinsic ferromagnetic semiconducting CrGeTe3
• Relativistic exchange interactions in CrX${}_3$ (X=Cl, Br, I) monolayers
• Effect of hydrostatic pressure on ferromagnetism in two-dimensional CrI${}_3$
• Strain and electric-field control of spin-spin interactions in monolayer CrI${}_3$
• Anisotropic magnetocaloric effect and critical behavior in CrCl${}_3$

Cited by in corpus (1)

• Interior and edge magnetization in thin exfoliated CrGeTe3 films