Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 71, Issue 5, Pages 1318-1324Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.71.1318
Keywords
graphite; carbon nanotube; effective-mass theory; Berry's phase; topological singularity
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A topological anomaly present at zero energy is shown to give rise to a peculiar and singular behavior of the dynamic and static conductivity in two-dimensional honeycomb lattices. A calculation in a self-consistent Born approximation reveals that this singular dependence prevails although being somewhat smoothed out even if level broadening effects are taken into account.
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