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  All-optical generation of antiferromagnetic magnon currents via the magnon circular photogalvanic effect

Viñas Boström, E., Parvini, T. S., McIver, J. W., Rubio, A., Kusminskiy, S. V., & Sentef, M. A. (2021). All-optical generation of antiferromagnetic magnon currents via the magnon circular photogalvanic effect. Physical Review B, 104(10): L100404. doi:10.1103/PhysRevB.104.L100404.

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PhysRevB.104.L100404.pdf (Publisher version), 870KB
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PhysRevB.104.L100404.pdf
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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© the Author(s). Published by the American Physical Society
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supplemental.pdf (Supplementary material), 2MB
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Supplemental Material: The first section provides details on the diagonalization of the spin Hamiltonian, the spin current operator and the interaction Hamiltonian for stimulated Raman scattering. The second section contains the derivation of the general symmetry allowed form of the magnon photocurrent. The third section gives the derivation of the optical susceptibility of the microscopic spin Hamiltonian. The fourth section shows how to convert the magnon photocurrent into an inverse spin Hall effect voltage.
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https://arxiv.org/abs/2104.10914 (Preprint)
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 Creators:
Viñas Boström, E.1, 2, Author              
Parvini, T. S.3, 4, Author
McIver, J. W.2, 5, Author              
Rubio, A.1, 2, 6, Author              
Kusminskiy, S. V.3, 7, Author
Sentef, M. A.2, 8, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free Electron Laser Science (CFEL), ou_persistent22              
3Max Planck Institute for the Science of Light, ou_persistent22              
4Institute of Physics, University of Greifswald, ou_persistent22              
5Ultrafast Transport in Quantum Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3185036              
6Center for Computational Quantum Physics, The Flatiron Institute, ou_persistent22              
7Institute for Theoretical Physics, University of Erlangen-Nürnberg, ou_persistent22              
8Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              

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 Abstract: We introduce the magnon circular photogalvanic effect enabled by two-magnon Raman scattering. This provides an all-optical pathway to the generation of directed magnon currents with circularly polarized light in honeycomb antiferromagnetic insulators. The effect is the leading order contribution to magnon photocurrent generation via optical fields. Control of the magnon current by the polarization and angle of incidence of the laser is demonstrated. Experimental detection by sizable inverse spin Hall voltages in platinum contacts is proposed.

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Language(s): eng - English
 Dates: 2021-04-222021-08-242021-09-072021-09-01
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2104.10914
DOI: 10.1103/PhysRevB.104.L100404
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 104 (10) Sequence Number: L100404 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008