Spin-selective pathways in linear and nonlinear photoemission from ferromagnets (Articolo in rivista)

Type
Label
  • Spin-selective pathways in linear and nonlinear photoemission from ferromagnets (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.85.165137 (literal)
Alternative label
  • Cheng-Tien Chiang,1 Aimo Winkelmann,1,* J¨urgen Henk,1 Francesco Bisio,1,2 and J¨urgen Kirschner1 (2012)
    Spin-selective pathways in linear and nonlinear photoemission from ferromagnets
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cheng-Tien Chiang,1 Aimo Winkelmann,1,* J¨urgen Henk,1 Francesco Bisio,1,2 and J¨urgen Kirschner1 (literal)
Pagina inizio
  • 165137/1 (literal)
Pagina fine
  • 165137/4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 16 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany 2CNR-SPIN Corso Perrone 24, I-16152, Genova, Italy (literal)
Titolo
  • Spin-selective pathways in linear and nonlinear photoemission from ferromagnets (literal)
Abstract
  • We observe an enhanced spin polarization and reduction of surface sensitivity due to the intermediate unoccupied electronic states in spin-resolved two-photon photoemission (2PPE) from ultrathin ferromagnetic cobalt films. By comparison to one-photon photoemission (1PPE) measurements, we disentangle the 2PPE signals coming from the initial and intermediate electronic states and determine the influence of the unoccupied quantum-well states in the nonlinear two-photon transitions. Our results point out the importance of spindependent pathways in nonlinear photoemission and provide a possible mechanism of spin-filtering in optical transitions. (literal)
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