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5 papers · 2 filters
Magneto-optics of Gd and Tb in the soft x-ray resonance regions
J. E. Prieto, F. Heigl, O. Krupin +2
We present x-ray absorption spectra around the 3d-4f and 4d-4f excitation thresholds of in-plane magnetized Gd and Tb films measured by total electron yield using circularly polari…
Defect correlations, metal-insulator transition, and magnetic order in ferromagnetic semiconductors
Carsten Timm, Felix von Oppen
Diluted ferromagnetic III-V semiconductors typically show a high degree of compensation. Compensation is connected to the presence of comparable densities of charged defects of eit…
Prediction of huge X-ray Faraday rotation at the Gd N_4,5 threshold
J. E. Prieto, F. Heigl, O. Krupin +2
X-ray absorption spectra in a wide energy range around the 4d-4f excitation threshold of Gd were recorded by total electron yield from in-plane magnetized Gd metal films. Matching…
Excitations in time-dependent density-functional theory
H. Appel, E. K. U. Gross, K. Burke
An approximate solution to the time-dependent density functional theory (TDDFT) response equations for finite systems is developed, yielding corrections to the single-pole approxim…
Correlated defects, metal-insulator transition, and magnetic order in ferromagnetic semiconductors
C. Timm, F. Schäfer, F. von Oppen
The effect of disorder on transport and magnetization in ferromagnetic III-V semiconductors, in particular (Ga,Mn)As, is studied theoretically. We show that Coulomb-induced correla…