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O: Fachverband Oberflächenphysik
O 30: Nanostructures at Surfaces III (Dots, Particles, Clusters)
O 30.7: Talk
Tuesday, March 27, 2007, 17:15–17:30, H36
interaction of scanning tunneling microscopy tip with adatoms, mesoscopic islands and molecules on metal surfaces — •kun tao1, ren z huang1, volodymyr v maslyuk2, mads brandbyge3, ingrid mertig2, valeri stepanyuk1, patrick bruno1, and jurgen kirschner1 — 1Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany — 2Martin-Luther-University Halle-Wittenberg, Fachbereich Physics , 06099, Halle,Germany — 3Condensed Matter Theory Group, Department of Physics, Uppsala University, SE-751, Sweden
We perform a realistic atomistic modeling and ab initio calculations for the tip interaction with magnetic adatoms, nanoislands and single molecules on metal surfaces. The electronic states and the magnetic moment of adatoms are found to depend strongly on the distance between the tip and the adatom[1]. Our results reveal tip-induced shape transitions in nanoislands as the tip approaches the surface[2]. Atomic relaxations in the tip, nanoislands and a substrate are discussed. The interaction between 3d adatoms and a single benzene molecule on Cu(001) is studied. Our results show that magnetic and transport properties of such magnetic systems can be significantly affected by the STM tip.
1.R.Z. Huang, V.S. Stepanyuk, A.L.Klavsyuk, W. Hergert, P.Bruno, and J. Kirschner,Phys. Rev. B 73 153404 (2006).
2.R.Z. Huang, V.S. Stepanyuk, and J. Kirschner, J. Phys. Cond. Matter 18, L217(2006).