Investigation of electronic properties of space-charge quantum wires
We investigated the electronic structure of space-charge quantum wires produced through attachment of Si donors in misorientation steps of semiconductor vicinal surfaces of GaAs, by means of density functional theory, taking into account of residual acceptors. The coupled Schrdinger and Poisson equations were self-consistently solved in the frame of ThomasFermi, Hartree and local density approximation, respectively. We found that the one-dimensional electron gas strongly depends upon the dopant concentration and residual acceptors. A presence of residual acceptors in GaAs makes it impossible to grow ?-doped quantum wires.
density functional theory local density approximation doping quantum wires