Large photogalvanic spin current by magnetic resonance in bilayer Cr trihalides

Abstract

Magnetic materials show rich optical responses related to the magnetic order. These phenomena reflect the nature of their excitations, providing a powerful probe for the magnetic states and a way to control them. In recent years, such studies were extended to the optical control of spin current using nonlinear optical response similar to the photogalvanic effect. However, neither a candidate material nor a general formula for calculating the photogalvanic spin current is known so far. In this work, we develop a general theory for the photogalvanic spin current through a magnetic resonance process. Using the nonlinear response formalism, we find the nonlinear conductivity consists of two contributions that involve one and two magnon bands; the latter is a contribution unknown to date. We argue that the two-band process produces a large photogalvanic spin current in the antiferromagnetic phase of bilayer CrI${}_3$ and CrBr${}_3$, whose resonance frequency can be tuned between GHz-THz range by an external magnetic field. Our findings open a route to the studies on the photogalvanic effect of spin angular momentum in realistic setups.

arXiv comment4 pages, 2 figures

References in corpus (39)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Antiferromagnetic spintronics
• Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
• Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials
• Electric-field switching of two-dimensional van der Waals magnets
• Single-cycle THz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3
• Quantized circular photogalvanic effect in Weyl semimetals
• Direct observation of van der Waals stacking dependent interlayer magnetism
• Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• Pressure-controlled interlayer magnetism in atomically thin CrI3
• Direct optical detection of Weyl fermion chirality in a topological semimetal
• Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
• Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe2
• Evolution of interlayer and intralayer magnetism in three atomically thin chromium trihalides
• Topological spin excitations in honeycomb ferromagnet CrI${}_3$
• Photocurrents in Weyl semimetals
• Confinement-induced Berry phase and helicity-dependent photocurrents
• Observation of Topological Photocurrents in the Chiral Weyl Semimetal RhSi
• Fundamental Spin Interactions Underlying the Magnetic Anisotropy in the Kitaev Ferromagnet CrI${}_3$
• Magnetically Switchable Light-Matter Interaction in the Two-Dimensional Magnet CrI3
• Direct observation of 2D magnons in atomically thin CrI${}_3$
• Two-dimensional terahertz magnetic resonance spectroscopy of collective spin waves
• Observation of spin current in quantum spin liquid
• Pure Spin Photocurrent in Non-centrosymmetric Crystals: Bulk Spin Photovoltaic Effect
• Laser-Driven Multiferroics and Ultrafast Spin Current Generation
• Nonlinear magnetization dynamics of antiferromagnetic spin resonance induced by intense terahertz magnetic field
• Emergent Electromagnetic Induction and Adiabatic Charge Pumping in Weyl Semimetals
• Theoretically predicted picosecond optical switching of spin chirality in multiferroics
• Topological magnon insulator spin excitations in the two-dimensional ferromagnet CrBr${}_3$
• Relaxation Mechanism for Ordered Magnetic Materials
• PT-symmetry enabled spin circular photogalvanic effect in antiferromagnetic insulators
• Distinctive magnetic properties of CrI3 and CrBr3 monolayers caused by spin-orbit coupling
• Linear and Nonlinear Optical Responses in Kitaev Spin Liquids
• Electron spin resonance and ferromagnetic resonance spectroscopy in the high-field phase of the van der Waals magnet CrCl${}_3$
• Rectification of Spin Current in Inversion-Asymmetric Magnets with Linearly-Polarized Electromagnetic Waves
• Theory for shift current of bosons: Photogalvanic spin current in ferrimagnetic and antiferromagnetic insulators
• Excitation of magnon spin photocurrents in antiferromagnetic insulators
• Two-photon driven magnon-pair resonance as a signature of spin-nematic order
• Nonlinear orbital response across topological phase transition in centrosymmetric materials

Cited by in corpus (1)

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