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Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion

Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently driv...

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Autores principales: Ilyakov, Igor, Brataas, Arne, de Oliveira, Thales V. A. G., Ponomaryov, Alexey, Deinert, Jan-Christoph, Hellwig, Olav, Faßbender, Jürgen, Lindner, Jürgen, Salikhov, Ruslan, Kovalev, Sergey
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10622539/
https://www.ncbi.nlm.nih.gov/pubmed/37919284
http://dx.doi.org/10.1038/s41467-023-42845-8
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author Ilyakov, Igor
Brataas, Arne
de Oliveira, Thales V. A. G.
Ponomaryov, Alexey
Deinert, Jan-Christoph
Hellwig, Olav
Faßbender, Jürgen
Lindner, Jürgen
Salikhov, Ruslan
Kovalev, Sergey
author_facet Ilyakov, Igor
Brataas, Arne
de Oliveira, Thales V. A. G.
Ponomaryov, Alexey
Deinert, Jan-Christoph
Hellwig, Olav
Faßbender, Jürgen
Lindner, Jürgen
Salikhov, Ruslan
Kovalev, Sergey
author_sort Ilyakov, Igor
collection PubMed
description Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently drive coherent angular momentum transfer in nanometer-thick ferromagnet/heavy-metal heterostructures. This process is non-resonant and does neither require external magnetic fields nor cryogenics. The efficiency of this process is more than one order of magnitude higher as compared to the recently observed THz-induced spin pumping in MnF(2) antiferromagnet. The coherently driven spin currents originate from the ultrafast spin Seebeck effect, caused by a THz-induced temperature imbalance in electronic and magnonic temperatures and fast relaxation of the electron-phonon system. Owing to the fact that the electron-phonon relaxation time is comparable with the period of a THz wave, the induced spin current results in THz second harmonic generation and THz optical rectification, providing a spintronic basis for THz frequency mixing and rectifying components.
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spelling pubmed-106225392023-11-04 Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion Ilyakov, Igor Brataas, Arne de Oliveira, Thales V. A. G. Ponomaryov, Alexey Deinert, Jan-Christoph Hellwig, Olav Faßbender, Jürgen Lindner, Jürgen Salikhov, Ruslan Kovalev, Sergey Nat Commun Article Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently drive coherent angular momentum transfer in nanometer-thick ferromagnet/heavy-metal heterostructures. This process is non-resonant and does neither require external magnetic fields nor cryogenics. The efficiency of this process is more than one order of magnitude higher as compared to the recently observed THz-induced spin pumping in MnF(2) antiferromagnet. The coherently driven spin currents originate from the ultrafast spin Seebeck effect, caused by a THz-induced temperature imbalance in electronic and magnonic temperatures and fast relaxation of the electron-phonon system. Owing to the fact that the electron-phonon relaxation time is comparable with the period of a THz wave, the induced spin current results in THz second harmonic generation and THz optical rectification, providing a spintronic basis for THz frequency mixing and rectifying components. Nature Publishing Group UK 2023-11-02 /pmc/articles/PMC10622539/ /pubmed/37919284 http://dx.doi.org/10.1038/s41467-023-42845-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ilyakov, Igor
Brataas, Arne
de Oliveira, Thales V. A. G.
Ponomaryov, Alexey
Deinert, Jan-Christoph
Hellwig, Olav
Faßbender, Jürgen
Lindner, Jürgen
Salikhov, Ruslan
Kovalev, Sergey
Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title_full Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title_fullStr Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title_full_unstemmed Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title_short Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
title_sort efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10622539/
https://www.ncbi.nlm.nih.gov/pubmed/37919284
http://dx.doi.org/10.1038/s41467-023-42845-8
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