Tunneling and nonlinear transport in a vertically coupled GaAs/AlGaAs double quantum wire system

Abstract

We report low-dimensional tunneling in an independently contacted vertically coupled quantum wire system. This nanostructure is fabricated in a high quality GaAs/AlGaAs parallel double quantum well heterostructure. Using a novel flip chip technique to align top and bottom split gates to form low-dimensional constrictions in each of the independently contacted quantum wells we explicitly control the subband occupation of the individual wires. In addition to the expected 2D-2D tunneling results, we have found additional tunneling features that are related to the 1D quantum wires.

arXiv comment4 pages, 3 figures, submitted to APL Minor revisions

References in corpus (3)

• Filtering spin with tunnel-coupled electron wave guides
• Finite-size effects in tunneling between parallel quantum wires
• Interference and zero-bias anomaly in tunneling between Luttinger-liquid wires

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• Electric-Field Control of Bound States and Optical Spectrum in Window-Coupled Quantum Waveguides
• Spin filtering in nanowire directional coupler