Quantized conductance and intersubband scattering in serially connected quantum wires
Department of Physics, Swiss Federal Institute of
Technology (EPFL) CH-1015 Lausanne, Switzerland
2 Department of Physics, Tel-Aviv University - Ramat-Aviv, Israel
Accepted: 27 April 2001
We studied the conductance of quantum wires (QWRs) with rigid confinement potential in different configurations, including single QWRs, QWRs with restricted access to the 2D reservoirs, and serially connected QWRs. We explain the deviations of quantized conductance values from as coming from the lack of 1D/2D coupling. The role of intersubband scattering in establishing contact between the QWR and 2D reservoirs is demonstrated. The achievement of conductance step values close to in these wires depends on establishing strong intersubband scattering without significant backscattering.
PACS: 73.23.Ad – Ballistic transport / 73.40.Cg – Contact resistance, contact potential / 73.63.Nm – Quantum wires
© EDP Sciences, 2001