title: Interplay of Electron and Nuclear Spin Noise in n-Type GaAs.
abstract: We present spin-noise spectroscopy measurements on an ensemble of donor-bound electrons in ultrapure GaAs:Si covering temporal dynamics over 6 orders of magnitude from milliseconds to nanoseconds. The spin-noise spectra detected at the donor-bound exciton transition show the multifaceted dynamical regime of the ubiquitous mutual electron and nuclear spin interaction typical for III-V-based semiconductor systems. The experiment distinctly reveals the finite Overhauser shift of an electron spin precession at zero external magnetic field and a second contribution around zero frequency stemming from the electron spin components parallel to the nuclear spin fluctuations. Moreover, at very low frequencies, features related with time-dependent nuclear spin fluctuations are clearly resolved making it possible to study the intricate nuclear spin dynamics at zero and low magnetic fields. The findings are in agreement with the developed model of electron and nuclear spin noise.
authors.affiliation: Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Berski
authors.affiliation: Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Hübner
authors.affiliation: Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Oestreich
authors.affiliation: Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany.
authors.forename: Arne
authors.initials: A
authors.lastname: Ludwig
authors.affiliation: Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany.
authors.forename: A D
authors.initials: AD
authors.lastname: Wieck
authors.affiliation: Ioffe Institute, Polytechnicheskaya 26, 194021 St. Petersburg, Russia.|Spin Optics Laboratory, St. Petersburg State University, Ul'anovskaya 1, Peterhof, 198504 St. Petersburg, Russia.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Glazov