Dynamical Conductivity and Zero-Mode Anomaly in Honeycomb Lattices
2002 年 71 巻 5 号 p. 1318-1324
詳細
2002 年 71 巻 5 号 p. 1318-1324
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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