Transport through quasi-ballistic quantum wires: the role of contacts
Abstract
We model one-dimensional transport through a quantum wire by a Luttinger liquid with three different interaction parameters for the leads, the contact regions and the wire, and with two barriers at the contacts. We show that this model explains several features of recent experiments, such as the flat conductance plateaux observed even after finite temperature and length renormalizations, and universal conductance corrections in different channels. We discuss the criteria required to observe resonant transmission and give an explanation of the resonance-like structure seen by several groups around 0.7 - 0.8 times 2e^2/h.Keywords
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