Münster 1999 – wissenschaftliches Programm

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O: Oberflächenphysik

O 11: Poster (I)

O 11.53: Poster

Montag, 22. März 1999, 19:30–22:30, Aula

Electronic structure of epitaxial fcc-Mn films — •A. Dallmeyer1, C. Carbone1, W. Eberhardt1, C. Pampuch2, O. Rader2, and W. Gudat21Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich — 2BESSY, Lentzeallee 100, D-14195 Berlin

The investigation of ultrathin layer structures allows to address the correlation between the electronic structure, magnetism, and atomic geometry in the solid state. Epitaxial Mn films (1-30 ML) have been grown on Cu3Au(100) and have been investigated by angle-resolved photoemission with synchrotron radiation. These films present a very sharp LEED pattern, which previous investigations [1] show to derive from a fcc-Mn lattice. The photoemission spectra of the fcc-Mn films display two well-defined structures, located at 2.5 eV and 0.1 eV binding energies. The Mn photoemission structures do not show energy dispersion with photon energy or emission angle. This observation is in sharp contrast with the behaviour of the later (fcc-Fe, -Co, -Ni, -Cu) 3d-metals. The present results point out the inadequacy of a single-particle picture and the importance of electron correlation in the description of this Mn system.

[1] B. Schirmer, M. Wuttig, to be published.

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