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

Bielejec, E.; Seamons, J. A.; Reno, J. L.; Lilly, M. P.
February 2005
Applied Physics Letters;2/21/2005, Vol. 86 Issue 8, p083101
Academic Journal
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 unique 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 two-dimensional (2D)-2D tunneling results, we have found additional tunneling features that are related to the one-dimensional quantum wires.


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