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Lithographic engineering of anisotropies in (Ga,Mn)As
S. Hümpfner, M. Sawicki, K. Pappert +6
The focus of studies on ferromagnetic semiconductors is moving from material issues to device functionalities based on novel phenomena often associated with the anisotropy properti…
Transport Characterization of the Magnetic Anisotropy of (Ga,Mn)As
K. Pappert, S. Hümpfner, J. Wenisch +4
The rich magnetic anisotropy of compressively strained (Ga,Mn)As has attracted great interest recently. Here we discuss a sensitive method to visualize and quantify the individual…
Exciton spin decay modified by strong electron-hole exchange interaction
G. V. Astakhov, A. V. Koudinov, K. V. Kavokin +7
We study exciton spin decay in the regime of strong electron-hole exchange interaction. In this regime the electron spin precession is restricted within a sector formed by the exte…
Magnetization-Switched Metal-Insulator Transition in a (Ga,Mn)As Tunnel Device
K. Pappert, M. J. Schmidt, S. Hümpfner +6
We observe the occurrence of an Efros-Shklovskii gap in (Ga,Mn)As based tunnel junctions. The occurrence of the gap is controlled by the extent of the hole wave-function on the Mn…
Optical spin pumping of modulation doped electrons probed by a two-color Kerr rotation technique
H. Hoffmann, G. V. Astakhov, T. Kiessling +5
We report on optical spin pumping of modulation electrons in CdTe-based quantum wells with low intrinsic electron density (by 10^10 cm^{-2}). Under continuous wave excitation, we r…
Vertex Corrections on the Anomalous Hall Effect in Spin-polarized Two-dimensional Electron Gases with Rashba Spin-orbit Interaction
Jun-ichiro Inoue, Takashi Kato, Yasuhito Ishikawa +3
We study the effect of disorder on the intrinsic anomalous Hall (AH) conductivity in a spin-polarized two-dimensional electron gas with a Rashba-type spin-orbit interaction. We fin…