Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 15: Spin-Orbit Interaction at Surfaces II

O 15.5: Vortrag

Montag, 22. März 2010, 16:00–16:15, H38

Local topography and density of states in the Bi_xPb_1−x/Ag(111) mixed surface alloy — •Fabian Zinser, Maximilian Assig, Klaus Kern, and Christian R. Ast — Max Planck Institute for Solid State Research, Stuttgart, Germany

The Bi/Ag(111) and Pb/Ag(111) surface alloys exhibit a 2D electronic structure with an extremely large spin-splitting [1]. Mixing the relative amounts of Bi and Pb atoms at the surface creates a mixed surface alloy where the spin-splitting as well as the band occupation can be tuned continuously [2]. We present a study of the electronic structure and local topography at the surface of the Bi_xPb_1−x/Ag(111) mixed surface alloy using scanning tunneling microscopy and spectroscopy (STM/STM). We discuss the local disorder of the Pb and Bi alloy atoms as well as the evolution of the local density of states as a function of relative Bi and Pb content.
C. R. Ast et al., Phys. Rev. B 75, 201401(R) (2007)
C. R. Ast et al., Phys. Rev. B 77, 081407(R) (2008)