title: Size-dependent fine-structure splitting in self-organized InAs/GaAs quantum dots.
abstract: A systematic variation of the exciton fine-structure splitting with quantum dot size in single quantum dots grown by metal-organic chemical vapor deposition is observed. The splitting increases from to as much as with quantum dot size. A change of sign is reported for small quantum dots. Model calculations within the framework of eight-band theory and the configuration interaction method were performed. Different sources for the fine-structure splitting are discussed, and piezoelectricity is pinpointed as the only effect reproducing the observed trend.
authors.affiliation: Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Seguin
authors.forename: A
authors.initials: A
authors.lastname: Schliwa
authors.forename: S
authors.initials: S
authors.lastname: Rodt
authors.forename: K
authors.initials: K
authors.lastname: Pötschke
authors.forename: U W
authors.initials: UW
authors.lastname: Pohl
authors.forename: D
authors.initials: D
authors.lastname: Bimberg