Parts | Days | Selection | Search | Updates | Downloads | Help
HL: Fachverband Halbleiterphysik
HL 35: Poster I
HL 35.10: Poster
Tuesday, March 8, 2016, 15:00–19:00, Poster A
Low magnetic field wavelength modulation absorption spectroscopy of donor bound excitons in 28Si:P — •Michael Beck1, Helge Riemann2, Jens Hübner1, and Michael Oestreich1 — 1Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstrasse 2, D-30167 Hannover — 2Leibniz Institut für Kristallzüchtung, Max-Born-Strasse 2, D-12489 Berlin
Donor atoms in a crystalline silicon host are promising candidates for the implementation of
quantum information devices [1]. The decoupling of donor atoms from the nuclear spin bath
of the host lattice by means of isotopical enrichment leads to very long coherence times of
donor electron spins [2]. We will employ non-perturbative spin noise spectroscopy [3] to
unveil the intrinsic spin dynamics of donor bound electrons in weakly doped 28Si:P in the
millikelvin temperature regime.
As preparatory measurements, we investigate the electronic structure of the donor-bound
exciton in a magnetic field by means of modulation absorption spectroscopy, which allows for
a determination of the oscillator strength and fine structure. The ultra-narrow linewidth [4] of
the bound exciton transition furthermore reveals the magnetic field dependence of the electron
and hole Landé
g-factor at low magnetic fields.
[1] B.E. Kane, Nature 393, 133 (1998).
A.M. Tyryshkin et al., Nature Matter. 11, 143, (2012).
J. Hübner et al., Phys. Stat. Solidi (B) 251, 1824 (2014).
M. L. W. Thewalt et al., J. Appl. Phys. 101, 081724 (2007).