Yousuke Kobayashi

Observation of zigzag and armchair edges of graphite using scanning tunneling microscopy and spectroscopy

The presence of structure-dependent edge states of graphite is revealed by both ambient and ultrahigh-vacuum (UHV) scanning tunneling microscopy and scanning tunneling spectroscopy observations. On a hydrogenated zigzag (armchair) edge, bright spots are (are not) observed together with a

Edge state on hydrogen-terminated graphite edges investigated by scanning tunneling microscopy

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Electronic structures of graphene edges and nanographene

superlattice near the Fermi level (

Magnetic nanographite: an approach to molecular magnetism

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Novel electronic wave interference patterns in nanographene sheets

for a peak of the local density of states) under UHV, demonstrating that a zigzag edge is responsible for the edge states, although there is no appreciable difference between as-prepared zigzag and armchair edges in air. Even in the hydrogenated armchair edge, however, bright spots are observed at defect points, at which partial zigzag edges are created in the armchair edge.

STM observation of electronic wave interference effect in finite-sized graphite with dislocation-network structures

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

Resonance Raman Scattering in Carbon Nanotubes and Nanographites

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Anisotropy of the Raman Spectra of Nanographite Ribbons

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Structures and electronic properties of surface/edges of nanodiamond and nanographite

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STM/STS observation of peculiar electronic states at graphite edges

-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.