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  Laser-Driven Multiferroics and Ultrafast Spin Current Generation

Sato, M., Takayoshi, S., & Oka, T. (2016). Laser-Driven Multiferroics and Ultrafast Spin Current Generation. Physical Review Letters, 117(14): 147202, pp. 1-5. doi:10.1103/PhysRevLett.117.147202.

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 Creators:
Sato, Masahiro1, Author
Takayoshi, Shintaro1, Author
Oka, Takashi2, Author           
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 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.

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Language(s): eng - English
 Dates: 2016-09-282016-09-28
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 117 (14) Sequence Number: 147202 Start / End Page: 1 - 5 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1