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Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga1−xMnxAs alloys

Michel, C. ; Baranovskii, S. D ; Thomas, P. ; Heimbrodt, W ; Elm, M. T. ; Klar, P. J. ; Goldlücke, B. ; Wurstbauer, Ursula ; Reinwald, Matthias ; Wegscheider, Werner
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Date of publication of this fulltext: 25 Jan 2010 13:51


Abstract

We study the changes of magnetoresistance induced by controlled thermal annealing at temperatures ranging from 300 to 600 °C of a Ga0.98Mn0.02As alloy grown by low-temperature molecular beam epitaxy. We use a resistor-network model for describing the electrical transport as a function of temperature and external magnetic field. The model is founded on classical semiconductor band transport and ...

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