Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 50: Symposium: Surface Spectroscopy on Kondo Systems II (Invited Speakers: Jonathan Denlinger, Johann Kroha, Alexander Schneider)
O 50.1: Hauptvortrag (ohne Erstattung)
Mittwoch, 27. Februar 2008, 15:15–15:45, HE 101
ARPES Mapping of the Fermi Surfaces of Three-Dimensional Heavy Fermion Systems — •Jonathan Denlinger — Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Angle-resolved photoemission (ARPES) on most heavy fermion f-electron systems is a very challenging task because they are typically three-dimensional, incurring effects of kz-broadening, and may not cleave well. Also their electronic structures typically contain many overlapping bands and very small (meV) hybridization energy scales near the Fermi level thus requiring high momentum- and energy-resolution. Experimental advances in electron spectrometers, x-ray synchrotron sources and automation have enabled acquisition of large variable photon-energy ARPES electronic structure maps that permit a kz-tomographic determination of the 3D band structures and Fermi surfaces with sufficient detail to be truly complementary to dHvA in addressing theoretical predictions for this class of materials. Progress in this direction is discussed for the systems of CeRu2Si2, CeCoIn5 and YbBiPt.