Scientific article
Open access

Laser-Driven Multiferroics and Ultrafast Spin Current Generation

Published inPhysical review letters, vol. 117, no. 14, 147202
Publication date2016

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.

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Citation (ISO format)
SATO, Masahiro, TAKAYOSHI, Shintaro, OKA, Takashi. Laser-Driven Multiferroics and Ultrafast Spin Current Generation. In: Physical review letters, 2016, vol. 117, n° 14, p. 147202. doi: 10.1103/PhysRevLett.117.147202
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Article (Published version)
ISSN of the journal0031-9007

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