Electron-hole bilayer quantum dots: Phase diagram and exciton localization
Mesoscale and Nanoscale Physics
2009-11-10 v1 Strongly Correlated Electrons
Abstract
We studied a vertical ``quantum dot molecule'', where one of the dots is occupied with electrons and the other with holes. We find that different phases occur in the ground state, depending on the carrier density and the interdot distance. When the system is dominated by shell structure, orbital degeneracies can be removed either by Hund's rule, or by Jahn-Teller deformation. Both mechanisms can lead to a maximum of the addition energy at mid-shell. At low densities and large interdot distances, bound electron-hole pairs are formed.
Cite
@article{arxiv.cond-mat/0310338,
title = {Electron-hole bilayer quantum dots: Phase diagram and exciton localization},
author = {K. Karkkainen and M. Koskinen and M. Manninen and S. M. Reimann},
journal= {arXiv preprint arXiv:cond-mat/0310338},
year = {2009}
}
Comments
10 pages, 3 figures