  The edge states that emerge at hydrogen-terminated zigzag edges embedded in
dominant armchair edges of graphite are carefully investigated by
ultrahigh-vacuum scanning tunneling microscopy (STM) measurements. The edge
states at the zigzag edges have different spatial distributions dependent on
the $\alpha$- or $\beta$-site edge carbon atoms. In the case that the defects
consist of a short zigzag (or a short Klein) edge, the edge state is present
also near the defects. The amplitude of the edge state distributing around the
defects in an armchair edge often has a prominent hump in a direction
determined by detailed local atomic structure of the edge. The tight binding
calculation based on the atomic arrangements observed by STM reproduces the
observed spatial distributions of the local density of states.
