Theory of light-induced effective magnetic field in Rashba ferromagnets

Abstract

Motivated by recent experiments on all-optical magnetization reversal in conductive ferromagnetic thin films we use nonequilibrium formalism to calculate the effective magnetic field induced in a Rashba ferromagnet by a short laser pulse. The main contribution to the effect originates in the direct optical transitions between spin-split subbands. The resulting effective magnetic field is inversely proportional to the impurity scattering rate and can reach the amplitude of a few Tesla in the systems like Co/Pt bilayers. We showthat the total light-induced effective magnetic field in ferromagnetic systems is the sum of two contributions: a helicity dependent term, which is an even function of magnetization, and a helicity independent term, which is an odd function of magnetization. The primary role of the spin-orbit interaction is to widen the frequency range for direct optical transitions.

9 pages, 3 figures

References in corpus (7)

• All-optical control of ferromagnetic thin films and nanostructures
• Giant Faraday rotation in single- and multilayer graphene
• Transport equations for a two-dimensional electron gas with spin-orbit interaction
• Microscopic Theory of Rashba Interaction in Magnetic Metal
• Anomalous Hall effect in a two-dimensional electron gas
• Spin-Orbit Torques in Two-Dimensional Rashba Ferromagnets
• Optical Conductivity of a Two-Dimensional Electron Liquid with Spin-Orbit Interaction

Cited by in corpus (21)

• Laser-induced torques in metallic ferromagnets
• Theory of the Interfacial Dzyaloshinskii-Moriya Interaction in Rashba Antiferromagnets
• Generation of single skyrmions by picosecond magnetic field pulses
• Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays
• Ultrafast Control of Spin Interactions in Honeycomb Antiferromagnetic Insulators
• Laser-induced torques in metallic antiferromagnets
• Optical spin transfer and spin-orbit torques in thin film ferromagnets
• Light Induced Orbital Magnetism in Metals via Inverse Faraday Effect
• Theory of electromagnetic wave propagation in ferromagnetic Rashba conductor
• Interface-induced field-like optical spin torque in a ferromagnet/heavy metal heterostructure
• Magnetic-field-induced crossover from the inverse Faraday effect to the optical orientation in EuTe
• Nonequilibrium magnons from hot electrons in antiferromagnetic systems
• Helicity-dependent optical control of the magnetization state emerging from the Landau-Lifshitz-Gilbert equation
• Interface enhanced helicity dependent photocurrent in metal/semimetal bilayers
• Giant inverse Faraday effect in Dirac semimetals
• Off-resonant all-optical switching dynamics in a ferromagnetic model system
• Light-induced Orbital and Spin Magnetism in $3d$, $4d$, and $5d$ Transition Metals
• Orbital Inverse Faraday and Cotton-Mouton Effects in Hall Fluids
• Chiral anomaly in Weyl semimetals from spin current injection
• Longitudinal optical and spin-Hall conductivities of Rashba conducting strips coupled to ferro- and antiferromagnetic layers
• AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals