Spin Pumping in Epitaxial Ge1-xSnx Alloys

The use of Ge<inf>1-x</inf>Sn<inf>x</inf> semiconductor alloys is generating significant interest in the scientific community due to their precisely tunable Sn content. This tunability makes them particularly attractive for applications in photonics, electronics, and, more re...

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Autores: Longo, Emanuele, Concepción, Omar, Mantovan, Roberto, Fanciulli, Marco, Myronov, Maksym, Bonera, Emiliano, Pedrini, Jacopo, Buca, Dan, Pezzoli, Fabio
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/424482
Acesso em linha:http://hdl.handle.net/10261/424482
https://api.elsevier.com/content/abstract/scopus_id/85211503272
Access Level:acceso abierto
Palavra-chave:Ferromagnetic resonance
GeSn alloys
Spin pumping
Spintronics
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dc.title.none.fl_str_mv Spin Pumping in Epitaxial Ge1-xSnx Alloys
title Spin Pumping in Epitaxial Ge1-xSnx Alloys
spellingShingle Spin Pumping in Epitaxial Ge1-xSnx Alloys
Longo, Emanuele
Ferromagnetic resonance
GeSn alloys
Spin pumping
Spintronics
title_short Spin Pumping in Epitaxial Ge1-xSnx Alloys
title_full Spin Pumping in Epitaxial Ge1-xSnx Alloys
title_fullStr Spin Pumping in Epitaxial Ge1-xSnx Alloys
title_full_unstemmed Spin Pumping in Epitaxial Ge1-xSnx Alloys
title_sort Spin Pumping in Epitaxial Ge1-xSnx Alloys
dc.creator.none.fl_str_mv Longo, Emanuele
Concepción, Omar
Mantovan, Roberto
Fanciulli, Marco
Myronov, Maksym
Bonera, Emiliano
Pedrini, Jacopo
Buca, Dan
Pezzoli, Fabio
author Longo, Emanuele
author_facet Longo, Emanuele
Concepción, Omar
Mantovan, Roberto
Fanciulli, Marco
Myronov, Maksym
Bonera, Emiliano
Pedrini, Jacopo
Buca, Dan
Pezzoli, Fabio
author_role author
author2 Concepción, Omar
Mantovan, Roberto
Fanciulli, Marco
Myronov, Maksym
Bonera, Emiliano
Pedrini, Jacopo
Buca, Dan
Pezzoli, Fabio
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Air Force Office of Scientific Research (US)
European Commission
Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
Generalitat de Catalunya
Longo, Emanuele [0000-0001-8538-571X]
Concepción, Omar [0000-0001-8197-7523]
Mantovan, Roberto [0000-0002-9353-4137]
Fanciulli, Marco [0000-0003-2951-0859]
Myronov, Maksym [0000-0001-7757-2187]
Bonera, Emiliano [0000-0003-1267-8508]
Pedrini, Jacopo [0000-0001-7312-3667]
Buca, Dan [0000-0002-3692-5596]
Pezzoli, Fabio [0000-0001-8570-7299]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Ferromagnetic resonance
GeSn alloys
Spin pumping
Spintronics
topic Ferromagnetic resonance
GeSn alloys
Spin pumping
Spintronics
description The use of Ge<inf>1-x</inf>Sn<inf>x</inf> semiconductor alloys is generating significant interest in the scientific community due to their precisely tunable Sn content. This tunability makes them particularly attractive for applications in photonics, electronics, and, more recently, spintronics. Room-temperature emission and detection of spin currents are observed in Ge<inf>1-x</inf>Sn<inf>x</inf>/Co hybrids through spin-pumping ferromagnetic resonance. Experiments conducted over a wide range of compositions and strains show that spin current injection is enhanced in Ge<inf>1-x</inf>Sn<inf>x</inf> solid solutions compared to elemental Ge. The magnetization dynamics reveal an intriguing scenario where the Gilbert damping constant and the spin mixing conductance display a non-monotonic behavior. The maximum spin-pumping efficiency occurs at a Sn molar fraction of ≈10 at.% and remains unaffected by the elastic strain built up in Ge<inf>1-x</inf>Sn<inf>x</inf> films through epitaxial growth on Ge-buffered Si substrates. These findings highlight the non-trivial dependence of alloy scattering in defining spin accumulation and relaxation mechanisms, providing insightful information on phenomena at the forefront of spintronics and quantum technology research.
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/424482
https://api.elsevier.com/content/abstract/scopus_id/85211503272
url http://hdl.handle.net/10261/424482
https://api.elsevier.com/content/abstract/scopus_id/85211503272
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-152225NB-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CEX2023-001263-S
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PDC2023-145824-I00
Advanced Quantum Technologies
http://doi.org/10.1002/qute.202400508
Sí
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dc.publisher.none.fl_str_mv Wiley-VCH
publisher.none.fl_str_mv Wiley-VCH
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instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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spelling Spin Pumping in Epitaxial Ge1-xSnx AlloysLongo, EmanueleConcepción, OmarMantovan, RobertoFanciulli, MarcoMyronov, MaksymBonera, EmilianoPedrini, JacopoBuca, DanPezzoli, FabioFerromagnetic resonanceGeSn alloysSpin pumpingSpintronicsThe use of Ge<inf>1-x</inf>Sn<inf>x</inf> semiconductor alloys is generating significant interest in the scientific community due to their precisely tunable Sn content. This tunability makes them particularly attractive for applications in photonics, electronics, and, more recently, spintronics. Room-temperature emission and detection of spin currents are observed in Ge<inf>1-x</inf>Sn<inf>x</inf>/Co hybrids through spin-pumping ferromagnetic resonance. Experiments conducted over a wide range of compositions and strains show that spin current injection is enhanced in Ge<inf>1-x</inf>Sn<inf>x</inf> solid solutions compared to elemental Ge. The magnetization dynamics reveal an intriguing scenario where the Gilbert damping constant and the spin mixing conductance display a non-monotonic behavior. The maximum spin-pumping efficiency occurs at a Sn molar fraction of ≈10 at.% and remains unaffected by the elastic strain built up in Ge<inf>1-x</inf>Sn<inf>x</inf> films through epitaxial growth on Ge-buffered Si substrates. These findings highlight the non-trivial dependence of alloy scattering in defining spin accumulation and relaxation mechanisms, providing insightful information on phenomena at the forefront of spintronics and quantum technology research.The authors express their gratitude to S. Oyarzún and M. Jamet for their insightful discussions. The work was supported financially by the Air Force Office of Scientific Research under award number FA8655-22-1-7050, the PNRR MUR project PE0000023-NQSTI, and the European Commission through the LASTSTEP Project under grant agreement 101070208. Additional funding was provided by the Spanish Ministry of Science and Innovation through Projects PID2023-152225NB-I00 and Severo Ochoa MATRANS42 (CEX2023-001263-S), supported by MICIU/AEI/10.13039/501100011033 and FEDER, EU. The authors also acknowledge support from Projects TED2021-129857B-I00 and PDC2023-145824-I00, funded by MCIN/AEI/10.13039/501100011033 and the European Union NextGeneration EU/PRTR, as well as from project 2021 SGR 00445 funded by the Generalitat de Catalunya.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2023-001263-S).Peer reviewedWiley-VCHAir Force Office of Scientific Research (US)European CommissionMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Generalitat de CatalunyaLongo, Emanuele [0000-0001-8538-571X]Concepción, Omar [0000-0001-8197-7523]Mantovan, Roberto [0000-0002-9353-4137]Fanciulli, Marco [0000-0003-2951-0859]Myronov, Maksym [0000-0001-7757-2187]Bonera, Emiliano [0000-0003-1267-8508]Pedrini, Jacopo [0000-0001-7312-3667]Buca, Dan [0000-0002-3692-5596]Pezzoli, Fabio [0000-0001-8570-7299]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/424482https://api.elsevier.com/content/abstract/scopus_id/85211503272reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/HE/101070208info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-152225NB-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CEX2023-001263-Sinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PDC2023-145824-I00Advanced Quantum Technologieshttp://doi.org/10.1002/qute.202400508Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4244822026-05-22T06:33:51Z
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