title: Few-electron molecular states and their transitions in a single InAs quantum dot molecule.
abstract: We study electronic configurations in a single pair of vertically coupled self-assembled InAs quantum dots, holding just a few electrons. By comparing the experimental data of nonlinear single-electron transport spectra in a magnetic field with many-body calculations, we identify the spin and orbital configurations to confirm the formation of molecular states by filling both the quantum mechanically coupled symmetric and antisymmetric states. Filling of the antisymmetric states is less favored with increasing magnetic field, and this leads to various magnetic field induced transitions in the molecular states.
authors.affiliation: ERATO/SORST/ICORP, JST, Atsugi-shi, Kanagawa 243-0198, Japan. ota@will.brl.ntt.co.jp
authors.forename: T
authors.initials: T
authors.lastname: Ota
authors.forename: M
authors.initials: M
authors.lastname: Rontani
authors.forename: S
authors.initials: S
authors.lastname: Tarucha
authors.forename: Y
authors.initials: Y
authors.lastname: Nakata
authors.forename: H Z
authors.initials: HZ
authors.lastname: Song
authors.forename: T
authors.initials: T
authors.lastname: Miyazawa
authors.forename: T
authors.initials: T
authors.lastname: Usuki
authors.forename: M
authors.initials: M
authors.lastname: Takatsu
authors.forename: N
authors.initials: N
authors.lastname: Yokoyama