Laser-Driven Multiferroics and Ultrafast Spin Current Generation

Abstract

We propose an ultrafast way to generate spin chirality and spin current in a class of multiferroic magnets using a terahertz circularly polarized laser. Using the Floquet formalism for periodically driven systems, we show that it is possible to dynamically control the Dzyaloshinskii-Moriya interaction in materials with magnetoelectric coupling. This is supported by numerical calculations, by which additional resonant phenomena are found. Specifically, when a static magnetic field is applied in addition to the circularly polarized laser, a large resonant enhancement of spin chirality is observed resembling the electron spin resonance. Spin current is generated when the laser is spatially modulated by chiral plasmonic structures and could be detected using optospintronic devices.

5 pages, 5 figures, 2 columns + Supplemental Material (4 pages, 5 figures)

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Cited by in corpus (71)

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• Periodically, Quasi-periodically, and Randomly Driven Conformal Field Theories (II): Furstenberg's Theorem and Exceptions to Heating Phases
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• Control of Magnetic and Topological Orders with a DC Electric Field
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• Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
• Light-induced switching of magnetic order in the anisotropic triangular-lattice Hubbard model
• Twisted light-induced spin-spin interaction in a chiral helimagnet
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