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Phys. Rev. B 66, 233403 (2002) [4 pages]

Atomic-layer-resolved quantum oscillations in the work function:  Theory and experiment for Ag/Fe(100)

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J. J. Paggel1, C. M. Wei2,3, M. Y. Chou3, D.-A. Luh4, T. Miller5,6, and T.-C. Chiang5,6
1Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany
2Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan 11529, Republic of China
3School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430
4Stanford Linear Accelerator Center, Menlo Park, California 94025
5Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080
6Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois 61801-2902

Received 4 September 2002; published 6 December 2002

The work function of atomically uniform Ag films grown on Fe(100) is measured as a function of film thickness. It shows layer-resolved variations as a result of quantum confinement of the valence electrons. A first-principles calculation reproduces the observed variations except for very thin films (one and two monolayers), and the differences can be attributed, in part, to strain effects caused by the lattice mismatch between Ag and Fe. These results illustrate the close interaction between interface effects and surface properties.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.233403
DOI:
10.1103/PhysRevB.66.233403
PACS:
73.30.+y, 73.20.At, 73.21.Fg, 79.60.Dp
 
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