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

Karkkainen, K; Koskinen, M; Manninen, M and Reimann, Stephanie LU (2004) In Solid State Communications 130(3-4). p.187-191
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.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
quantum dot molecule, electron-hole plasma
in
Solid State Communications
volume
130
issue
3-4
pages
187 - 191
publisher
Pergamon
external identifiers
  • wos:000220538900008
  • scopus:1642304824
ISSN
1879-2766
DOI
10.1016/j.ssc.2004.02.003
language
English
LU publication?
yes
id
a9ce0d4d-63b7-40ac-9299-4040cd5e4d33 (old id 282010)
date added to LUP
2007-10-23 15:51:06
date last changed
2017-06-04 03:30:50
@article{a9ce0d4d-63b7-40ac-9299-4040cd5e4d33,
  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.},
  author       = {Karkkainen, K and Koskinen, M and Manninen, M and Reimann, Stephanie},
  issn         = {1879-2766},
  keyword      = {quantum dot molecule,electron-hole plasma},
  language     = {eng},
  number       = {3-4},
  pages        = {187--191},
  publisher    = {Pergamon},
  series       = {Solid State Communications},
  title        = {Electron-hole bilayer quantum dots: phase diagram and exciton localization},
  url          = {http://dx.doi.org/10.1016/j.ssc.2004.02.003},
  volume       = {130},
  year         = {2004},
}