title: Spin noise spectroscopy in GaAs (110) quantum wells: access to intrinsic spin lifetimes and equilibrium electron dynamics.
abstract: In this Letter, the first spin noise spectroscopy measurements in semiconductor systems of reduced effective dimensionality are reported. The nondemolition measurement technique gives access to the otherwise concealed intrinsic, low temperature electron spin relaxation time of n-doped GaAs (110) quantum wells and to the corresponding low temperature anisotropic spin relaxation. The Brownian motion of the electrons within the spin noise probe laser spot becomes manifest in a modification of the spin noise line width. Thereby, the spatially resolved observation of the stochastic spin polarization uniquely allows to study electron dynamics at equilibrium conditions with a vanishing total momentum of the electron system.
authors.affiliation: Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstrasse 2, 30167 Hannover, Germany. mueller@nano.uni-hannover.de
authors.forename: Georg M
authors.initials: GM
authors.lastname: Müller
authors.forename: Michael
authors.initials: M
authors.lastname: Römer
authors.forename: Dieter
authors.initials: D
authors.lastname: Schuh
authors.forename: Werner
authors.initials: W
authors.lastname: Wegscheider
authors.forename: Jens
authors.initials: J
authors.lastname: Hübner
authors.forename: Michael
authors.initials: M
authors.lastname: Oestreich