Recent experimental measurements on transport through carbon nanotubes in the Coulomb Blockade regime showed, at zero bias and zero magnetic field, an alternation in the Coulomb peak heights as electrons are added to the nanotube. This surprising peak-height alternation is shown to be related to the odd/even parity of the number of electrons in-sider the nanotube. We investigated this phenomenon theoretically with a new many-body approach, and find that the anomalous behavior may be attributed to the spin degener-ate states. We also show that asymmetric current saturation as a function of bias voltage polarity, also observed experimentally, is due to eigenstate relaxations within the nanotube.
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