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We study the low-energy electronic properties of a junction made of twocrossed metallic carbon nanotubes of general chiralities. We derive a tightbinding tunneling matrix element that couples low-energy states on the twotubes, which allows us to calculate the contact conductance of the junction. Wefind that the intrinsic asymmetries of the junction cause the forward andbackward hopping probabilities from one tube to another to be different. Thisdefines a zero-field Hall conductance for the junction, which we find to scaleinversely with the junction contact conductance. Through a systematic study ofthe dependence of the junction conductance on different junction parameters, wefind that the crossing angle is the dominant factor which determines themagnitude of the conductance.

Low Energy Coherent Transport in Metallic Carbon Nanotube Junctions