Singly ionized double-donor complex in vertically coupled quantum dots
1 Group of Investigation in Condensed Matter Theory, Universidad del Magdalena, Santa Marta, Colombia
2 Universidad Industrial de Santander, A. A. 678, Bucaramanga, Colombia
Nanoscale Research Letters 2012, 7:489 doi:10.1186/1556-276X-7-489Published: 31 August 2012
The electronic states of a singly ionized on-axis double-donor complex (D2+) confined in two identical vertically coupled, axially symmetrical quantum dots in a threading magnetic field are calculated. The solutions of the Schrödinger equation are obtained by a variational separation of variables in the adiabatic limit. Numerical results are shown for bonding and antibonding lowest-lying artificial molecule states corresponding to different quantum dot morphologies, dimensions, separation between them, thicknesses of the wetting layers, and magnetic field strength.