Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.10: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Spin polarized surface states on stepped magnetic surfaces : ab-initio approach. — •Oleg Stepanyuk1, Oleg Polyakov1, and Valeri Stepanyuk2 — 1Faculty of Physics, Moscow State University, 119899 Moscow, Russia — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
It was shown that surface states electrons become spin polarized above magnetic layers and nanoislands[1]. In the present work we perform the state of the art ab-initio studies of surface state electrons at steps of magnetic metals. We focus on steps of 3d metals on Cu(111) surface. We have revealed a spin-dependent charge transfer at step ages which is explained by Smoluchowski effect. Strongly inhomogeneous spin polarization of surface statates[1] at steps is revealed. Our results indicate that tunneling magnetoresistance at steps can exhibit very strong changes at the atomic scale. [1]* L. Diekhoner et. al. Phys. Rev. Lett. 90, 236801