Electron-hole bilayer quantum dots: phase diagram and exciton localization

K Karkkainen, M Koskinen, M Manninen, Stephanie Reimann

Research output: Contribution to journalArticlepeer-review

Abstract

We studied a vertical 'quantum dot molecule', where one of the dots is occupied by electrons and the other by 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. (C) 2004 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)187-191
JournalSolid State Communications
Volume130
Issue number3-4
DOIs
Publication statusPublished - 2004

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

Subject classification (UKÄ)

  • Physical Sciences

Free keywords

  • quantum dot molecule
  • electron-hole plasma

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