Research GroupsGroup OestreichResearch topics
Interplay of Electron and Nuclear Spin Noise

Interplay of Electron and Nuclear Spin Noise

The neutral exciton transition (D0X) of Si-donor bound electrons is probed resonantly and the n-doped GaAs sample represents an ensemble of central spins.

We measure the electron spin dynamic at 4.2 K by spin noise spectroscopy. The experimental difference spectrum shows unambiguously the hyperfine coupling and contains contributions of transverse and longitudinal spin lifetime. The theoretical model for these spin noise powers is based on finite correlation time and explains the lineshapes. Further, the longitudinal spin lifetime is dependent on the excitation density and limited by the reorientation of nuclear spins.

The experiments yield for low frequencies the nuclear spin noise of the different isotopes. By that, we perform all optical NMR at low magnetic fields and thermal equilibrium and detect signatures of small quadrupolar interactions.

Experimental and theoretical spin noise power density.
Nuclear spin noise spectra as a function of the transverse magnetic field.

PERSON OF CONTACT

PD Dr. Jens Hübner
Other Teachers/Employees
Address
Appelstraße 2
30167 Hannover
Building
Room
125
PD Dr. Jens Hübner
Other Teachers/Employees
Address
Appelstraße 2
30167 Hannover
Building
Room
125