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  Accessing Ultrafast Spin-Transport Dynamics in Copper Using Broadband Terahertz Spectroscopy

Jechumtál, J., Rouzegar, R., Gückstock, O., Denker, C., Hoppe, W., Remy, Q., et al. (2024). Accessing Ultrafast Spin-Transport Dynamics in Copper Using Broadband Terahertz Spectroscopy. Physical Review Letters, 132(22): 226703. doi:10.1103/PhysRevLett.132.226703.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-521B-8 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-5AC8-B
Genre: Journal Article

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 Creators:
Jechumtál, Jiří, Author
Rouzegar, Reza1, Author           
Gückstock, Oliver1, Author           
Denker, Christian, Author
Hoppe, Wolfgang, Author
Remy, Quentin, Author
Seifert, Tom1, Author           
Kubaščík, Peter, Author
Woltersdorf, Georg, Author
Brouwer, Piet W., Author
Münzenberg, Markus, Author
Kampfrath, Tobias1, Author                 
Nádvorník, Lukáš, Author
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall, Condensed Matter, Materials Science, cond-mat.mtrl-sci
 Abstract: We study the spatiotemporal dynamics of ultrafast electron spin transport across nanometer-thick copper layers using broadband terahertz spectroscopy. Our analysis of temporal delays, broadening and attenuation of the spin-current pulse revealed ballistic-like propagation of the pulse peak, approaching the Fermi velocity, and diffusive features including a significant velocity dispersion. A comparison to the frequency-dependent Ficks law identified the diffusion-dominated transport regime for distances larger than 2 nm. The findings lie the groundwork for designing future broadband spintronic devices.

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Language(s): eng - English
 Dates: 2023-10-182024-01-312023-10-152024-04-152024-05-302024-05-31
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2310.12082
DOI: 10.1103/PhysRevLett.132.226703
 Degree: -

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Project name : TERAMAG - Ultrafast spin transport and magnetic order controlled by terahertz electromagnetic pulses
Grant ID : 681917
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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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: 8 Volume / Issue: 132 (22) Sequence Number: 226703 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1