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Conductance anomalies in a one-dimensional quantum contact

Conductance anomalies in a one-dimensional quantum contact

Short length quantum wires (quantum contacts) exhibit a conductance structure at the value of conductance close to $0.7\ifmmode\times\else\texttimes\fi{}{2e}^{2}/h.$ The structure is also called the conductance anomaly. In longer contacts the structure evolves to the lower values of conductance. We demonstrate that this structure is related to the development of charge …