title: Dissociation of vertical semiconductor diatomic artificial molecules.
abstract: We investigate the dissociation of few-electron circular vertical semiconductor double quantum dot artificial molecules at 0 T as a function of interdot distance. A slight mismatch introduced in the fabrication of the artificial molecules from nominally identical constituent quantum wells induces localization by offsetting the energy levels in the quantum dots by up to 2 meV, and this plays a crucial role in the appearance of the addition energy spectra as a function of coupling strength particularly in the weak coupling limit.
authors.affiliation: Departament ECM, Facultat de Física, Universitat de Barcelona, E-08028 Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Pi
authors.forename: A
authors.initials: A
authors.lastname: Emperador
authors.forename: M
authors.initials: M
authors.lastname: Barranco
authors.forename: F
authors.initials: F
authors.lastname: Garcias
authors.forename: K
authors.initials: K
authors.lastname: Muraki
authors.forename: S
authors.initials: S
authors.lastname: Tarucha
authors.forename: D G
authors.initials: DG
authors.lastname: Austing