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Electron and nuclear spin dynamics in fluorine doped II/VI semiconductors

In cooperation with the workgroup of Prof. Dr. Manfred Bayer (Experimental Physics II, Technical University of Dortmund) we study the magneto-spectroscopy properties of the ensemble of fluorine donors in epitaxially grown II/VI semiconductor quantum structures.

Here we focus on the electron and nuclear spin dynamics, spin coherence times and dephasing mechanism measured by advanced optical pump probe techniques. In this context, the influence of the donor concentration and the nuclei fluctuations in the ZnSe host matrix on the spin dynamics is of particular interest on the way to long-lived spin quantum memories.

Nuclear Spin Dynamics Left: Polarization recovery curves extracted from Kerr-rotation and resonant spin amplification spectroscopy for low (green circles) and high (blue dots) fluorine doping levels. Right: Fluorine bound-electron spin relaxation time at low doping concentration.

Selected Publications in this topic:

“Longitudinal and transverse spin dynamics of donor-bound electrons in fluorine-doped ZnSe: Spin inertia versus Hanle effect”, F. Heisterkamp, E.A. Zhukov, A. Greilich, D.R. Yakovlev, V.L. Korenev, A. Pawlis and M. Bayer, Phys. Rev B 91, 235432 (2015).

“Inhomogeneous nuclear spin polarization induced by helicity-modulated optical excitation of fluorine-bound electron spins in ZnSe”, F. Heisterkamp, A. Greilich, E.A. Zhukov, E. Kirstein, T. Kazimierczuk, V.L. Korenev, I.A. Yugova, D.R. Yakovlev, A. Pawlis and M. Bayer, Phys. Rev B. 92, 245441 (2015).

“Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe”, F. Heisterkamp, E. Kirstein, A. Greilich, E.A. Zhukov, T. Kazimierczuk, D.R. Yakovlev, A. Pawlis and M. Bayer, Phys. Rev. B (Rapid. Comm.) 93, 081409(R) (2016).