Neumaier, Daniel and Turek, Marko and Wurstbauer, Ursula and Vogl, Anton and Utz, Martin and Wegscheider, Werner and Weiss, Dieter
All-Electrical Measurement of the Density of States in (Ga,Mn)As.
Physical Review Letters (PRL) 103, p. 87203.
Other URL: http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PRLTAO000103000008087203000001&idtype=cvips&prog=normal
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.