Stabilization mechanism of edge states in graphene

K. Sasaki, S. Murakami, R. Saito

Research output: Contribution to journalArticle

120 Citations (Scopus)

Abstract

It has been known that edge states of a graphite ribbon are zero-energy, localized eigen-states. We show that next nearest-neighbor hopping process decreases the energy of the edge states at zigzag edge with respect to the Fermi energy. The energy reduction of the edge states is calculated analytically by first-order perturbation theory and numerically. The resultant model is consistent with the peak of recent scanning tunneling spectroscopy measurements.

Original languageEnglish
Article number113110
JournalApplied Physics Letters
Volume88
Issue number11
DOIs
Publication statusPublished - 2006 Mar 30

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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