title: Anomalous spin dephasing in (110) GaAs quantum wells: anisotropy and intersubband effects.
abstract: A strong anisotropy of electron spin decoherence is observed in GaAs/(AlGa)As quantum wells grown on a (110) oriented substrate. The spin lifetime of spins perpendicular to the growth direction is about one order of magnitude shorter compared to spins along [110]. The spin lifetimes of both spin orientations decrease monotonically above temperatures of 80 and 120 K, respectively. The decrease is very surprising for spins along the [110] direction and cannot be explained by the usual Dyakonov-Perel dephasing mechanism. A novel spin dephasing mechanism is put forward that is based on scattering of electrons between different quantum well subbands.
authors.affiliation: Institut für Festkörperphysik, Universität Hannover, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Döhrmann
authors.forename: D
authors.initials: D
authors.lastname: Hägele
authors.forename: J
authors.initials: J
authors.lastname: Rudolph
authors.forename: M
authors.initials: M
authors.lastname: Bichler
authors.forename: D
authors.initials: D
authors.lastname: Schuh
authors.forename: M
authors.initials: M
authors.lastname: Oestreich