Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals
Abstract The interplay of electronic charge, spin, and orbital currents, coherently driven by picosecond long oscillations of light fields in spin-orbit coupled systems, is the foundation of emerging terahertz lightwave spintronics and orbitronics. The essential rules for how terahertz fields intera...
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Nature Portfolio
2025-01-01
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| Series: | npj Spintronics |
| Online Access: | https://doi.org/10.1038/s44306-024-00068-7 |
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| author | Ruslan Salikhov Markus Lysne Philipp Werner Igor Ilyakov Michael Schüler Thales V. A. G. de Oliveira Alexey Ponomaryov Atiqa Arshad Gulloo Lal Prajapati Jan-Christoph Deinert Pavlo Makushko Denys Makarov Thomas Cowan Jürgen Fassbender Jürgen Lindner Aleksandra Lindner Carmine Ortix Sergey Kovalev |
| author_facet | Ruslan Salikhov Markus Lysne Philipp Werner Igor Ilyakov Michael Schüler Thales V. A. G. de Oliveira Alexey Ponomaryov Atiqa Arshad Gulloo Lal Prajapati Jan-Christoph Deinert Pavlo Makushko Denys Makarov Thomas Cowan Jürgen Fassbender Jürgen Lindner Aleksandra Lindner Carmine Ortix Sergey Kovalev |
| author_sort | Ruslan Salikhov |
| collection | DOAJ |
| description | Abstract The interplay of electronic charge, spin, and orbital currents, coherently driven by picosecond long oscillations of light fields in spin-orbit coupled systems, is the foundation of emerging terahertz lightwave spintronics and orbitronics. The essential rules for how terahertz fields interact with these systems in a nonlinear way are still not understood. In this work, we demonstrate a universally applicable electronic nonlinearity originating from spin-orbit interactions in conducting materials, wherein the interplay of light-induced spin and orbital textures manifests. We utilized terahertz harmonic generation spectroscopy to investigate the nonlinear dynamics over picosecond timescales in various transition metal films. We found that the terahertz harmonic generation efficiency scales with the spin Hall conductivity in the studied films, while the phase takes two possible values (shifted by π), depending on the d-shell filling. These findings elucidate the fundamental mechanisms governing non-equilibrium spin and orbital polarization dynamics at terahertz frequencies, which is relevant for potential applications of terahertz spin- and orbital-based devices. |
| format | Article |
| id | doaj-art-470a898faf944cc0bccdda82019dd78a |
| institution | Kabale University |
| issn | 2948-2119 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Spintronics |
| spelling | doaj-art-470a898faf944cc0bccdda82019dd78a2025-02-02T12:06:38ZengNature Portfolionpj Spintronics2948-21192025-01-01311710.1038/s44306-024-00068-7Spin-orbit interaction driven terahertz nonlinear dynamics in transition metalsRuslan Salikhov0Markus Lysne1Philipp Werner2Igor Ilyakov3Michael Schüler4Thales V. A. G. de Oliveira5Alexey Ponomaryov6Atiqa Arshad7Gulloo Lal Prajapati8Jan-Christoph Deinert9Pavlo Makushko10Denys Makarov11Thomas Cowan12Jürgen Fassbender13Jürgen Lindner14Aleksandra Lindner15Carmine Ortix16Sergey Kovalev17Helmholtz-Zentrum Dresden-RossendorfDepartment of Physics, University of FribourgDepartment of Physics, University of FribourgHelmholtz-Zentrum Dresden-RossendorfDepartment of Physics, University of FribourgHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfHelmholtz-Zentrum Dresden-RossendorfDipartimento di Fisica “E.R. Caianiello”, Universita di SalernoHelmholtz-Zentrum Dresden-RossendorfAbstract The interplay of electronic charge, spin, and orbital currents, coherently driven by picosecond long oscillations of light fields in spin-orbit coupled systems, is the foundation of emerging terahertz lightwave spintronics and orbitronics. The essential rules for how terahertz fields interact with these systems in a nonlinear way are still not understood. In this work, we demonstrate a universally applicable electronic nonlinearity originating from spin-orbit interactions in conducting materials, wherein the interplay of light-induced spin and orbital textures manifests. We utilized terahertz harmonic generation spectroscopy to investigate the nonlinear dynamics over picosecond timescales in various transition metal films. We found that the terahertz harmonic generation efficiency scales with the spin Hall conductivity in the studied films, while the phase takes two possible values (shifted by π), depending on the d-shell filling. These findings elucidate the fundamental mechanisms governing non-equilibrium spin and orbital polarization dynamics at terahertz frequencies, which is relevant for potential applications of terahertz spin- and orbital-based devices.https://doi.org/10.1038/s44306-024-00068-7 |
| spellingShingle | Ruslan Salikhov Markus Lysne Philipp Werner Igor Ilyakov Michael Schüler Thales V. A. G. de Oliveira Alexey Ponomaryov Atiqa Arshad Gulloo Lal Prajapati Jan-Christoph Deinert Pavlo Makushko Denys Makarov Thomas Cowan Jürgen Fassbender Jürgen Lindner Aleksandra Lindner Carmine Ortix Sergey Kovalev Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals npj Spintronics |
| title | Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals |
| title_full | Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals |
| title_fullStr | Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals |
| title_full_unstemmed | Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals |
| title_short | Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals |
| title_sort | spin orbit interaction driven terahertz nonlinear dynamics in transition metals |
| url | https://doi.org/10.1038/s44306-024-00068-7 |
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