Open Access Nano Express

Singly ionized double-donor complex in vertically coupled quantum dots

Ramón Manjarres-García1, Gene E Escorcia-Salas1, Ilia D Mikhailov2 and José Sierra-Ortega1*

Author Affiliations

1 Group of Investigation in Condensed Matter Theory, Universidad del Magdalena, Santa Marta, Colombia

2 Universidad Industrial de Santander, A. A. 678, Bucaramanga, Colombia

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Nanoscale Research Letters 2012, 7:489 doi:10.1186/1556-276X-7-489

Published: 31 August 2012

Abstract

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.

Keywords:
Quantum dots; Adiabatic approximation; Artificial molecule; 78.67.-n; 78.67.Hc; 3.21.-b