Electron-electron interaction in 2D and 1D ferromagnetic (Ga,Mn)As

Details Electron-electron interaction in 2D and 1D ferromagnetic (Ga,Mn)As Electron-electron interaction in 2D and 1D ferromagnetic (Ga,Mn)As

2007-11-21

arxiv.org/abs/0711.3278v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, v2: spelling of author name corrected

Scientific paper

10.1103/PhysRevB.77.041306

We investigated the magnetotransport in high quality ferromagnetic (Ga,Mn)As films and wires. At low temperature the conductivity decreases with decreasing temperature without saturation down to 20 mK. Here we show, that the conductivity decrease follows a ln($T/T_0$) dependency in 2D films and a $-1/\sqrt{T}$ dependency in 1D wires and is independent of an applied magnetic field. This behavior can be explained by the theory of electron-electron interaction.

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