Abstract
We observe novel behavior in the non‐linear conductance of semiconductor quantum wires near pinch‐off. In this regime, their low‐temperature (<1K) differential conductance increases dramatically from zero to a value above 2e2/h. This enhancement depends strongly on temperature, in‐plane magnetic field, and wire length. Our results suggest that this resonance is related to the formation of a novel many‐body state in the quantum wires near pinch‐off.
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