Charge and spin photocurrents in the Rashba model

Abstract

In metallic noncentrosymmetric crystals and at surfaces the response of spin currents and charge currents to applied electric fields contains contributions that are second order in the electric field, which are forbidden by symmetry in centrosymmetric systems. Thereby, photocurrents and spin photocurrents can be generated in inversion asymmetric metals by the application of femtosecond laser pulses. We study the laser-induced charge current in the ferromagnetic Rashba model with in-plane magnetization and find that this \textit{magnetic photogalvanic effect} can be tuned to be comparable in size to the laser-induced photocurrents measured experimentally in magnetic bilayer systems such as Co/Pt. Additionally, we show that femtosecond laser pulses excite strong spin currents in the nonmagnetic Rashba model when the Rashba parameter is large.

References in corpus (11)

• Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
• Direct optical detection of Weyl fermion chirality in a topological semimetal
• Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• THz emission from Co/Pt bilayers with varied roughness, crystal structure, and interface intermixing
• Laser-induced torques in metallic ferromagnets
• Mixed Weyl semimetals and dissipationless magnetization control in insulators by spin-orbit torques
• Ultrafast demagnetization in bulk vs thin films: an ab-initio study
• Inductive detection of field-like and damping-like AC inverse spin-orbit torques in ferromagnet/normal metal bilayers
• Photoinduced pure spin current injection in graphene with Rashba spin-orbit interaction
• Charge pumping driven by the laser-induced dynamics of the exchange splitting

Cited by in corpus (8)

• Laser-induced torques in metallic ferromagnets
• Spin and Orbital Magnetism by Light in Rutile Altermagnets
• Orbital Rashba effect as a platform for robust orbital photocurrents
• Laser-induced torques in metallic antiferromagnets
• Laser-induced charge and spin photocurrents at BiAg${}_2$ surface: a first principles benchmark
• Photocurrents of charge and spin in single-layer Fe${}_3$GeTe${}_2$
• Optically induced spin Hall current in Janus transition-metal dichalcogenides
• Theory of unidirectional magnetoresistance and nonlinear Hall effect