title: Super-long life time for 2D cyclotron spin-flip excitons.
abstract: An experimental technique for the indirect manipulation and detection of electron spins entangled in two-dimensional magnetoexcitons has been developed. The kinetics of the spin relaxation has been investigated. Photoexcited spin-magnetoexcitons were found to exhibit extremely slow relaxation in specific quantum Hall systems, fabricated in high mobility GaAs/AlGaAs structures; namely, the relaxation time reaches values over one hundred microseconds. A qualitative explanation of this spin-relaxation kinetics is presented. Its temperature and magnetic field dependencies are discussed within the available theoretical framework.
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: L V
authors.initials: LV
authors.lastname: Kulik
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Gorbunov
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: A S
authors.initials: AS
authors.lastname: Zhuravlev
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: V B
authors.initials: VB
authors.lastname: Timofeev
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: S
authors.initials: S
authors.lastname: Dickmann
authors.affiliation: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia.
authors.forename: I V
authors.initials: IV
authors.lastname: Kukushkin