Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Surface Magnetism

MA 28.5: Vortrag

Donnerstag, 29. März 2007, 16:15–16:30, H23

Spin-dependence of Ce 4f hybridization in magnetically ordered systems: A spin-resolved photoemission study of Ce/Fe(110) — •Yury Dedkov¹, Mikhail Fonin², Yury Kucherenko³, Serguei Molodtsov¹, Ulrich Rüdiger², and Clemens Laubschat¹ — ¹Institut für Festkörperphysik, Technische Universität Dresden, 01062 Dresden, Germany — ²Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — ³Institute for Metal Physics, National Academy of Sciences of Ukraine, 03142 Kiev, Ukraine

Spin- and angle-resolved resonant (Ce 4d→4f) photoemission spectra of a monolayer Ce on Fe(110) reveal spin-dependent changes of the Fermi-level peak intensities. That indicate a spin-dependence of 4f hybridization and, thus, of 4f occupancy and local moment. The phenomenon is described in the framework of the periodic Anderson model by 4f electron hopping into the exchange split Fe 3d derived bands that form a spin-gap at the Fermi energy around the G point of the surface Brillouin zone.