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All-Electrical Measurement of the Density of States in (Ga,Mn)As

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Neumaier, Daniel ; Turek, Marko ; Wurstbauer, Ursula ; Vogl, Anton ; Utz, Martin ; Wegscheider, Werner ; Weiss, Dieter
Date of publication of this fulltext: 17 Sep 2009 09:13


We report on electrical measurements of the effective density of states in the ferromagnetic semiconductor material (Ga,Mn)As. By analyzing the conductivity correction to an enhanced electron-electron interaction the electrical diffusion constant was extracted for (Ga,Mn)As samples of different dimensionality. Using the Einstein relation allows us to deduce the effective density of states of (Ga,Mn)As at the Fermi energy.

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