TY  - JOUR
AU  - Heisterkamp, F.
AU  - Greilich, A.
AU  - Zhukov, E. A.
AU  - Kirstein, E.
AU  - Kazimierczuk, T.
AU  - Korenev, V. L.
AU  - Yugova, I. A.
AU  - Yakovlev, D. R.
AU  - Pawlis, A.
AU  - Bayer, M.
TI  - Inhomogeneous nuclear spin polarization induced by helicity-modulated optical excitation of fluorine-bound electron spins in ZnSe
JO  - Physical review / B
VL  - 92
IS  - 24
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2016-02182
SP  - 245441
PY  - 2015
AB  - Optically induced nuclear spin polarization in a fluorine-doped ZnSe epilayer is studied by time-resolved Kerr rotation using resonant excitation of donor-bound excitons. Excitation with helicity-modulated laser pulses results in a transverse nuclear spin polarization, which is detected as a change of the Larmor precession frequency of the donor-bound electron spins. The frequency shift in dependence on the transverse magnetic field exhibits a pronounced dispersion-like shape with resonances at the fields of nuclear magnetic resonance of the constituent zinc and selenium isotopes. It is studied as a function of external parameters, particularly of constant and radio frequency external magnetic fields. The width of the resonance and its shape indicate a strong spatial inhomogeneity of the nuclear spin polarization in the vicinity of a fluorine donor. A mechanism of optically induced nuclear spin polarization is suggested based on the concept of resonant nuclear spin cooling driven by the inhomogeneous Knight field of the donor-bound electron.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000367378900017
DO  - DOI:10.1103/PhysRevB.92.245441
UR  - https://juser.fz-juelich.de/record/807764
ER  -