Interplay of Electron and Nuclear Spin Noise in GaAs

Abstract

We present spin noise (SN) measurements on an ensemble of donor-bound electrons in ultrapure GaAs:Si covering temporal dynamics over six orders of magnitude from milliseconds to nanoseconds. The SN 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 SN.

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• Longitudinal spin-relaxation of donor-bound electrons in direct bandgap semiconductors
• Spin temperature concept verified by optical magnetometry of nuclear spins
• Spin and reoccupation noise in a single quantum dot beyond the fluctuation-dissipation theorem
• Optical amplification of spin noise spectroscopy via homodyne detection
• Nuclear spin dynamics, noise, squeezing and entanglement in box model
• Spin dynamics of hopping electrons in quantum wires: algebraic decay and noise
• Measurement back-action and spin noise spectroscopy in a charged cavity-QED device in the strong coupling regime
• Microscopic dynamics of electron hopping in a semiconductor quantum well probed by spin-dependent photon echoes
• Reconstruction of nuclear quadrupole interaction in (In,Ga)As/GaAs quantum dots observed by transmission electron microscopy
• Closing the gap between spatial and spin dynamics of electrons at the metal-to-insulator transition
• Nuclear Spin Noise in the Central Spin Model
• Optical Resonance Shift Spin Noise Spectroscopy
• Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures
• Electron-induced nuclear magnetic ordering in n-type semiconductors
• Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
• Fourth-order spin correlation function in the extended central spin model
• Stochastic Faraday rotation induced by the electric current fluctuations in nanosystems
• Anomalous light-induced broadening of the spin-noise resonance in cesium vapor
• Kinetic approach to the nuclear-spin polaron formation