title: Electron and nuclear spin interactions in the optical spectra of single GaAs quantum dots.
abstract: Fine and hyperfine splittings arising from electron, hole, and nuclear spin interactions in the magneto-optical spectra of individual localized excitons are studied. We explain the magnetic field dependence of the energy splitting through competition between Zeeman, exchange, and hyperfine interactions. An unexpectedly small hyperfine contribution to the splitting close to zero applied field is described well by the interplay between fluctuations of the hyperfine field experienced by the nuclear spin and nuclear dipole/dipole interactions.
authors.affiliation: Naval Research Laboratory, Washington, DC, 20375, USA.
authors.forename: D
authors.initials: D
authors.lastname: Gammon
authors.forename: A L
authors.initials: AL
authors.lastname: Efros
authors.forename: T A
authors.initials: TA
authors.lastname: Kennedy
authors.forename: M
authors.initials: M
authors.lastname: Rosen
authors.forename: D S
authors.initials: DS
authors.lastname: Katzer
authors.forename: D
authors.initials: D
authors.lastname: Park
authors.forename: S W
authors.initials: SW
authors.lastname: Brown
authors.forename: V L
authors.initials: VL
authors.lastname: Korenev
authors.forename: I A
authors.initials: IA
authors.lastname: Merkulov