Non-Equilibrium RKKY Interaction in Irradiated Graphene

Abstract

We demonstrate that the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene can be strongly modified by a time-periodic driving field even in the weak drive regime. This effect is due to the opening of a dynamical band gap at the Dirac points when graphene is exposed to circularly polarized light. Using Keldysh-Floquet Green's functions, we develop a theoretical framework to calculate the time-averaged RKKY coupling under weak periodic drives and show that its magnitude in undoped graphene can be decreased controllably by increasing the driving strength, while mostly maintaining its ferromagnetic or antiferromagnetic character. In doped graphene, we find RKKY oscillations with a period that is tunable by the driving field. When a sufficiently strong drive is turned on that brings the Fermi level completely within the dynamically opened gap, the behavior of the RKKY coupling changes qualitatively from that of doped to undoped irradiated graphene.

arXiv comment20 pages,8 figures

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Cited by in corpus (13)

• Phonon-mediated dimensional crossover in bilayer CrI3
• Noncollinear twisted RKKY interaction on the optically driven SnTe(001) surface
• Photo-Induced Anomalous Hall Effect in Two-Dimensional Transition-Metal Dichalcogenides
• Effect of magnetic field and chemical potential on the RKKY interaction in the $\alpha$-${\mathcal{T}}_3$ lattice
• Magnetoplasmons for the $\alpha$-T${}_3$ model with filled Landau levels
• Anisotropic light-tailored RKKY interaction in two-dimensional $d$-wave altermagnets
• Probing topological phases in a perturbed Kane-Mele model via RKKY interaction: Application to monolayer jacutingaite Pt${}_2$HgSe${}_3$
• Floquet-driven indirect exchange interaction mediated by topological insulator surface states
• Impurity States and Indirect Exchange Interaction in Irradiated Graphene
• Impurity Screening and Friedel Oscillations in Floquet-driven Two-dimensional Metals
• Photo-induced Non-collinear Interlayer RKKY Coupling in Bulk Rashba Semiconductors
• Theory of Tunneling between Two-Dimensional Electron Layers Driven by Spin Pumping: Adiabatic Regime and Beyond
• Time-dependent exchange creates the time-frustrated state of matter