Journal
APPLIED SURFACE SCIENCE
Volume 161, Issue 3-4, Pages 508-514Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0169-4332(00)00374-3
Keywords
local electron states; hydrogen-etched graphite surface; scanning tunneling spectroscopy
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scanning tunneling microscopy (STM) and spectroscopy (STS) are used to study electronic states at the edges of the circular pits on the hydrogen-etched graphite surface. The edge surface state revealed by tunneling spectroscopy appears as the maximum of the local density of states (LDOS) in the energy range of 90-250 meV above the Fermi level. The dispersion of the energy state is explained by the band broadening in AB stacked H-terminated graphite. The magnitude of the edge state decreases with the distance from the pit edge as theoretically predicted. (C) 2000 Elsevier Science B.V. All rights reserved.
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