Report
View in EDS

Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers

Bibliographic Details
Title: Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers
Authors: Neufeld, Ofer, Tancogne-Dejean, Nicolas, De Giovannini, Umberto, Hübener, Hannes, Rubio, Angel
Publication Year: 2022
Collection: Condensed Matter
Physics (Other)
Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics
More Details: Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics. However, sub-femtosecond spin dynamics have not yet been observed or predicted. Here, we explore ultrafast light-driven spin dynamics in a highly non-resonant strong-field regime. Through state-of-the-art ab-initio calculations, we predict that a non-magnetic material can be transiently transformed into a magnetic one via dynamical extremely nonlinear spin-flipping processes, which occur on attosecond timescales and are mediated by a combination of multi-photon and spin-orbit interactions. These are non-perturbative non-resonant analogues to the inverse Faraday effect that build up from cycle-to-cycle as electrons gain angular momentum. Remarkably, we show that even for linearly polarized driving, where one does not intuitively expect any magnetic response, the magnetization transiently oscillates as the system interacts with light. This oscillating response is enabled by transverse anomalous light-driven currents in the solid, and typically occurs on timescales of ~500 attoseconds. We further demonstrate that the speed of magnetization can be controlled by tuning the laser wavelength and intensity. An experimental set-up capable of measuring these dynamics through pump-probe transient absorption spectroscopy is outlined and simulated. Our results pave the way for new regimes of ultrafast manipulation of magnetism.
Comment: 21 pages, 14 figures
Document Type: Working Paper
DOI: 10.1038/s41524-023-00997-7
Access URL: http://arxiv.org/abs/2207.06711
Accession Number: edsarx.2207.06711
Database: arXiv
FullText Text:
  Availability: 0
CustomLinks:
  – Url: http://arxiv.org/abs/2207.06711
    Name: EDS - Arxiv
    Category: fullText
    Text: View this record from Arxiv
    MouseOverText: View this record from Arxiv
  – Url: https://resolver.ebsco.com/c/xy5jbn/result?sid=EBSCO:edsarx&genre=article&issn=&ISBN=&volume=&issue=&date=20220714&spage=&pages=&title=Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers&atitle=Attosecond%20magnetization%20dynamics%20in%20non-magnetic%20materials%20driven%20by%20intense%20femtosecond%20lasers&aulast=Neufeld%2C%20Ofer&id=DOI:10.1038/s41524-023-00997-7
    Name: Full Text Finder (for New FTF UI) (s8985755)
    Category: fullText
    Text: Find It @ SCU Libraries
    MouseOverText: Find It @ SCU Libraries
Header DbId: edsarx
DbLabel: arXiv
An: edsarx.2207.06711
RelevancyScore: 1032
AccessLevel: 3
PubType: Report
PubTypeId: report
PreciseRelevancyScore: 1032.40502929688
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Neufeld%2C+Ofer%22">Neufeld, Ofer</searchLink><br /><searchLink fieldCode="AR" term="%22Tancogne-Dejean%2C+Nicolas%22">Tancogne-Dejean, Nicolas</searchLink><br /><searchLink fieldCode="AR" term="%22De+Giovannini%2C+Umberto%22">De Giovannini, Umberto</searchLink><br /><searchLink fieldCode="AR" term="%22Hübener%2C+Hannes%22">Hübener, Hannes</searchLink><br /><searchLink fieldCode="AR" term="%22Rubio%2C+Angel%22">Rubio, Angel</searchLink>
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2022
– Name: Subset
  Label: Collection
  Group: HoldingsInfo
  Data: Condensed Matter<br />Physics (Other)
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Condensed+Matter+-+Mesoscale+and+Nanoscale+Physics%22">Condensed Matter - Mesoscale and Nanoscale Physics</searchLink><br /><searchLink fieldCode="DE" term="%22Physics+-+Optics%22">Physics - Optics</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics. However, sub-femtosecond spin dynamics have not yet been observed or predicted. Here, we explore ultrafast light-driven spin dynamics in a highly non-resonant strong-field regime. Through state-of-the-art ab-initio calculations, we predict that a non-magnetic material can be transiently transformed into a magnetic one via dynamical extremely nonlinear spin-flipping processes, which occur on attosecond timescales and are mediated by a combination of multi-photon and spin-orbit interactions. These are non-perturbative non-resonant analogues to the inverse Faraday effect that build up from cycle-to-cycle as electrons gain angular momentum. Remarkably, we show that even for linearly polarized driving, where one does not intuitively expect any magnetic response, the magnetization transiently oscillates as the system interacts with light. This oscillating response is enabled by transverse anomalous light-driven currents in the solid, and typically occurs on timescales of ~500 attoseconds. We further demonstrate that the speed of magnetization can be controlled by tuning the laser wavelength and intensity. An experimental set-up capable of measuring these dynamics through pump-probe transient absorption spectroscopy is outlined and simulated. Our results pave the way for new regimes of ultrafast manipulation of magnetism.<br />Comment: 21 pages, 14 figures
– Name: TypeDocument
  Label: Document Type
  Group: TypDoc
  Data: Working Paper
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.1038/s41524-023-00997-7
– Name: URL
  Label: Access URL
  Group: URL
  Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2207.06711" linkWindow="_blank">http://arxiv.org/abs/2207.06711</link>
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edsarx.2207.06711
PLink https://login.libproxy.scu.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsarx&AN=edsarx.2207.06711
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1038/s41524-023-00997-7
    Subjects:
      – SubjectFull: Condensed Matter - Mesoscale and Nanoscale Physics
        Type: general
      – SubjectFull: Physics - Optics
        Type: general
    Titles:
      – TitleFull: Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Neufeld, Ofer
      – PersonEntity:
          Name:
            NameFull: Tancogne-Dejean, Nicolas
      – PersonEntity:
          Name:
            NameFull: De Giovannini, Umberto
      – PersonEntity:
          Name:
            NameFull: Hübener, Hannes
      – PersonEntity:
          Name:
            NameFull: Rubio, Angel
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 14
              M: 07
              Type: published
              Y: 2022
ResultId 1