Hüseyin Yüksel

Edge state distribution in an Aharonov-Bohm electron interferometer in the integer quantum Hall regime

In this study we analyze the density distributions of the two dimensional electron system for an experimental geometry which is topologically equivalent of an Aharonov-Bohm interferometer in three dimensions in the quantum Hall regime and obtain the spatial distribution of the edge states. We employ the Thomas-Fermi approximation in our analysis and solve the Poisson equation in three dimensional using a multi grid technique. Also we obtain the distribution of incompressible strips for a wide range of magnetic fields strengths and comment on their relation with experimental results in literature.

EPR of gamma irradiated single crystals of amphi-chloroglyoxime

γ-irradiated single crystals of amphi-chloroglyoxime were investigated by the electron paramagnetic resonance (EPR) between 123 and 400 K temperature. Paramagnetic species produced in the crystals were attributed to the R–HCĊNOH radical and relevant spectra were found to be temperature independent. The g-factor and hyperfine coupling constants of the R–HCĊNOH radical were found to be almost isotropic with the average values g = 2.0009, a CN = 31.89 G, a HC = 23.83 G, a OH = 9.49 G and the spin densities .