All-optical magnetization control in CrI$_3$ monolayers: a microscopic theory

TL;DR

This paper develops a microscopic theory combining ab-initio simulations and spin dynamics equations to demonstrate all-optical control of magnetization in CrI$_3$ monolayers, enabling tunable magnetic manipulation.

Contribution

It introduces a novel microscopic theoretical framework combining multiple computational approaches for all-optical magnetization control in CrI$_3$ monolayers.

Findings

Demonstrates tunable control of macroscopic magnetization.

Shows efficient interaction between excitons and lattice magnetization.

Provides a numerical solution for coupled spin dynamics equations.

Abstract

Bright excitons in ferromagnetic monolayers CrI$_3$ efficiently interact with lattice magnetization, which makes possible all-optical resonant magnetization control in this material. Using the combination of ab-initio simulations within Bethe-Salpeter approach, semiconductor Bloch equations and Landau-Lifshitz equations, we construct a microscopic theory of this effect. Solving numerically the resulting system of the coupled equations describing the dynamics of atomic spins and spins of the excitons, we demonstrate the possibility of a tunable control of macroscopic magnetization of a sample.