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Spin Dynamics across Metallic Layers on the Few-Femtosecond Timescale.
Géneaux, Romain; Chang, Hung-Tzu; Guggenmos, Alexander; Delaunay, Renaud; Légaré, François; Légaré, Katherine; Lüning, Jan; Parpiiev, Tymur; Molesky, Ilana J P; de Roulet, Bethany R; Zuerch, Michael W; Sharma, Sangeeta; Schultze, Martin; Leone, Stephen R.
Afiliação
  • Géneaux R; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Chang HT; Université Paris-Saclay, CEA, <a href="https://ror.org/04dy97z61">LIDYL</a>, 91191 Gif-sur-Yvette, Paris, France.
  • Guggenmos A; CY Cergy Paris Université, CEA, <a href="https://ror.org/04dy97z61">LIDYL</a>, 91191 Gif-sur-Yvette, Paris, France.
  • Delaunay R; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Légaré F; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Légaré K; Sorbonne Université, CNRS, <a href="https://ror.org/03z20vp15">Laboratoire de Chimie Physique-Matière et Rayonnement</a>, LCPMR, 75005 Paris, France.
  • Lüning J; <a href="https://ror.org/04td37d32">Institut National de la Recherche Scientifique</a>, Centre Énergie Matériaux et Télécommunications, Varennes, Québec, Canada.
  • Parpiiev T; <a href="https://ror.org/04td37d32">Institut National de la Recherche Scientifique</a>, Centre Énergie Matériaux et Télécommunications, Varennes, Québec, Canada.
  • Molesky IJP; <a href="https://ror.org/02aj13c28">Helmholtz-Zentrum Berlin für Materialien und Energie</a>, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
  • de Roulet BR; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Zuerch MW; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Sharma S; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Schultze M; Department of Chemistry, <a href="https://ror.org/01an7q238">University of California</a>, Berkeley, California 94720, USA.
  • Leone SR; Materials Science Division, <a href="https://ror.org/02jbv0t02">Lawrence Berkeley National Laboratory</a>, Berkeley, California 94720, USA.
Phys Rev Lett ; 133(10): 106902, 2024 Sep 06.
Article em En | MEDLINE | ID: mdl-39303257
ABSTRACT
We measure the light-driven response of a magnetic multilayer structure made of thin alternating layers of cobalt and platinum at the few-femtosecond timescale. Using attosecond magnetic circular dichroism, we observe how light rearranges the magnetic moment during and after excitation. The results reveal a sub-5 fs spike of magnetization in the platinum layer, which follows the shape of the driving pulse. With the help of time-dependent density functional theory, we interpret the observations as light-driven spin injection across the metallic layers of the structure. The light-triggered spin current is strikingly short, largely outpacing decoherence and dephasing. The findings suggest that the ability of shaping light fields in refined ways could be translated into shaping new forms of spin currents in materials.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article