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Cobalt Clusters on a Giant Graphite Lattice

Published online by Cambridge University Press:  15 February 2011

J. Xhie ,
K. Sattler ,
M. Ge  and
N. Venkateswaran
J. Xhie
Affiliation:
University of Hawaii, Department of Physics and Astronomy, 2505 Correa Road, Honolulu, HI 96822
K. Sattler
Affiliation:
University of Hawaii, Department of Physics and Astronomy, 2505 Correa Road, Honolulu, HI 96822
M. Ge
Affiliation:
University of Hawaii, Department of Physics and Astronomy, 2505 Correa Road, Honolulu, HI 96822
N. Venkateswaran
Affiliation:
University of Hawaii, Department of Physics and Astronomy, 2505 Correa Road, Honolulu, HI 96822
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Abstract

Using a scanning tunneling microscope in UHV we have observed anomalous superstructures on highly oriented pyrolytic graphite. We found such structures on three different samples, with hexagonal symmetry in each case but with different lattice constants of 1.7 nm, 3.8 nm and 6.6 nm. These giant lattices can be explained by assuming that the top layer of graphite is slightly rotated. This produces a hexagonal modulation of the electron state density in the first layer. Lattice points in the giant lattice are characterized by high local density of states at the Fermi level. We find that adsorbed cobalt particles occupy the top sites of the giant lattice.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 272: Symposium O – Chemical Processes in Inorganic Materials: Metal and Semiconductor Clusters , 1992 , 187
Copyright
Copyright © Materials Research Society 1992

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References

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