Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)
O 14.58: Poster
Montag, 27. März 2006, 18:00–21:00, P2
Surface State on Ultrathin fcc γ-Mn(111) Films on Au(111) — •Yury Dedkov1, Elena Voloshina2, Mikhail Fonin3, Ulrich Ruediger3, and Gernot Guentherodt4 — 1Institut für Festkörperphysik, Technische Universität Dresden, 01062 Dresden, Germany — 2Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany — 3Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — 4II. Physikalisches Institut, RWTH Aachen, 52056 Aachen, Germany
Crystallographic as well as electronic structure of thin Mn films on Au(111) surface has been investigated by means of scanning tunneling microscopy (STM) and angle-resolved photoelectron spectroscopy (ARPES) at room temperature. A structural phase transition from the fcc γ-Mn to the cubic α-Mn in thin Mn layers on Au(111) is accompanied by the changes in the electronic structure of thin Mn films as observed by ARPES. For the 1 ML of α-Mn on the Au(111) surface a peak at 0.8 eV of binding energy is observed in photoemission spectra, which disappears for Mn films thicker than 3 ML. Using ab initio band structure calculations this state at 0.8 eV is identified as a Γ-centered 3dz2-like surface state.