title: Pairing of spin excitations in lateral quantum dots.
abstract: We demonstrate the existence of correlated electronic states as paired spin excitations of lateral quantum dots in the integer quantum Hall regime. Starting from the spin-singlet filling-factor nu=2 droplet, by increasing the magnetic field we force the electrons to flip spins and increase the spin polarization. We identify the second spin-flip process as one accompanied by correlated, spin depolarized phases, interpreted as pairs of spin excitons. The correlated states are identified experimentally in few-electron lateral quantum dots using high source-drain voltage spectroscopy.
authors.affiliation: Institute for Microstructural Sciences, National Research Council of Canada, Ottawa K1A0R6, Canada.
authors.forename: Marek
authors.initials: M
authors.lastname: Korkusiński
authors.forename: Pawel
authors.initials: P
authors.lastname: Hawrylak
authors.forename: Mariusz
authors.initials: M
authors.lastname: Ciorga
authors.forename: Michel
authors.initials: M
authors.lastname: Pioro-Ladrière
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Sachrajda