Two- and three-dimensional band structure of ultrathin Ni on Cu(001)

Moritz Hoesch, Vladimir N. Petrov, Matthias Muntwiler, Matthias Hengsberger, Jorge Lobo Checa, Thomas Greber, and Jürg Osterwalder

Phys. Rev. B 79, 155404 – Published 2 April 2009

Abstract

The momentum-resolved electronic structure of ultrathin films of Ni on Cu(001) is investigated by angle-resolved photoemission in the thickness range between 2 and 6 monolayers and by first-principles slab calculations. While the $s p$ -band Fermi surface of Ni shows a full three-dimensional bulklike topology down to the thinnest films, the $d$ -band Fermi surface rearranges from a bulklike configuration in the thick films to a two-dimensional topology in the thinnest films. The reduced number of $d$ holes in the thin films is explained with the rearrangement of the characteristic $K$ -point lobe of the Ni Fermi surface.

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Received 31 October 2008

DOI:https://doi.org/10.1103/PhysRevB.79.155404

Authors & Affiliations

Moritz Hoesch¹, Vladimir N. Petrov², Matthias Muntwiler^3,*, Matthias Hengsberger³, Jorge Lobo Checa^3,†, Thomas Greber³, and Jürg Osterwalder³

¹European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble Cedex, France
²St. Petersburg State Polytechnical University, St. Petersburg 195251, Russia
³Physikinstitut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland

^*Present address: Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, USA.
^†Present address: Swiss Nanoscience Institute, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland.

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Vol. 79, Iss. 15 — 15 April 2009

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