title: Electrically tunable g factors in quantum dot molecular spin states.
abstract: We present a magnetophotoluminescence study of individual vertically stacked InAs/GaAs quantum dot pairs separated by thin tunnel barriers. As an applied electric field tunes the relative energies of the two dots, we observe a strong resonant increase or decrease in the g factors of different spin states that have molecular wave functions distributed over both quantum dots. We propose a phenomenological model for the change in g factor based on resonant changes in the amplitude of the wave function in the barrier due to the formation of bonding and antibonding orbitals.
authors.affiliation: Naval Research Laboratory, Washington, D.C. 20375, USA. doty@bloch.nrl.navy.mil
authors.forename: M F
authors.initials: MF
authors.lastname: Doty
authors.forename: M
authors.initials: M
authors.lastname: Scheibner
authors.forename: I V
authors.initials: IV
authors.lastname: Ponomarev
authors.forename: E A
authors.initials: EA
authors.lastname: Stinaff
authors.forename: A S
authors.initials: AS
authors.lastname: Bracker
authors.forename: V L
authors.initials: VL
authors.lastname: Korenev
authors.forename: T L
authors.initials: TL
authors.lastname: Reinecke
authors.forename: D
authors.initials: D
authors.lastname: Gammon