Double-donor complex in vertically coupled quantum dots in a threading magnetic field

Group of Investigation in Condensed Matter Theory, Universidad del Magdalena, Santa Marta, Colombia. .
Nanoscale Research Letters (Impact Factor: 2.78). 09/2012; 7(1):531. DOI: 10.1186/1556-276X-7-531
Source: PubMed


We consider a model of hydrogen-like artificial molecule formed by two vertically coupled quantum dots in the shape of axially symmetrical thin layers with on-axis single donor impurity in each of them and with the magnetic field directed along the symmetry axis. We present numerical results for energies of some low-lying levels as functions of the magnetic field applied along the symmetry axis for different quantum dot heights, radii, and separations between them. The evolution of the Aharonov-Bohm oscillations of the energy levels with the increase of the separation between dots is analyzed.

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