Abstract
The electronic structure of graphene in the presence of either sevenfolds or eightfolds is studied using a gauge field-theory model. The graphene sheet with topological defects is considered as a negative cone surface with an infinite Gaussian curvature at the center. The density of electronic states is calculated for a single seven-and eightfold as well as for a pair of sevenfolds with different morphology. The density of states at the Fermi energy is found to be zero in all cases except two sevenfolds with translational factor M ≠ 0.
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References
S. Iijima, P. M. Ayayan, and T. Ichihashi, Phys. Rev. Lett. 69, 3100 (1992).
H. Terrones and M. Terrones, New J. Phys. 5, 126.1 (2005).
A. V. Eletskii, Phys. Usp. 40, 899 (1997).
R. Tamura and M. Tsukada, Phys. Rev. B 49, 7697 (1994).
A. Cortijo and M. A. H. Vozmediano, Nucl. Phys. B 763, 293 (2007).
A. Cortijo and M. A. H. Vozmediano, EPL 77, 47002 (2007).
E. A. Kochetov and V. A. Osipov, J. Phys. A: Math. Gen. 32, 1961 (1999).
V. A. Osipov, E. A. Kochetov, and M. Pudlak, JETP 96, 140 (2003).
D. V. Kolesnikov and V. A. Osipov, JETP Lett. 79, 660 (2004).
V. A. Osipov and D. V. Kolesnikov, Rom. J. Phys. 50, 435 (2005); D. V. Kolesnikov and V. A. Osipov, Europhys. J. B 49, 465 (2006).
P. E. Lammert and V. H. Crespi, Phys. Rev. B 69, 035406 (2004).
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The text was submitted by the authors in English.