Exchange Interaction Effects on the Conductance of Quantum Wires

Details Exchange Interaction Effects on the Conductance of Quantum Wires Exchange Interaction Effects on the Conductance of Quantum Wires

2003-02-20

arxiv.org/abs/cond-mat/0302419v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages and 4 figures

Scientific paper

10.1088/0268-1242/19/4/083

The effect of exchange interaction on the two-terminal conductance of fully ballistic samples is studied using a many-particle wave packet formalism. The approach shows that the puzzling nonuniversal conductance quantization can be explained as a fermion exchange interaction effect. The Landauer conductance step Go is obtained when two-fermion interaction is considered. Reductions of Go are due to a many-particle exchange interaction effect. For ballistic GaAs/AlGaAs quantum wires longer than 1 um, a conductance step reduction is obtained in agreement with experimental results.

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