Bulk and boundary zero-bias anomaly in multiwall carbon nanotubes.
We compute the tunneling density of states of doped multiwall nanotubes including disorder and electron-electron interactions. A nonconventional Coulomb blockade reflecting nonperturbative Altshuler-Aronov-Lee power-law zero-bias anomalies is found, in accordance with recent experimental results. The presence of a boundary implies a universal doubling of the boundary exponent in the diffusive limit.
Egger
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Department of Mathematics, Imperial College, 180 Queen's Gate, London SW7 2BZ, United Kingdom.
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