Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 24, Pages 5190-5193Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5190
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The electronic structure of graphitic cones exhibits distinctive topological features associated with the apical disclinations. Ahranov-Bohm magnetoconductance oscillations (period Phi (0)) are completely absent in rings fabricated from cones with a single pentagonal disclination. Close to the apex, the local density of states changes qualitatively, either developing a cusp which drops to zero at the Fermi energy, or forming a region of nonzero density across E-F, a local metallization of graphite.
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