Anomalous Hall effect in field-effect structures of (Ga,Mn)As

Details Anomalous Hall effect in field-effect structures of (Ga,Mn)As Anomalous Hall effect in field-effect structures of (Ga,Mn)As

2011-01-04

arxiv.org/abs/1101.0652v2

Physical Review Letters 104, 106601 (2010)

Physics

Condensed Matter

Materials Science

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.104.106601

The anomalous Hall effect in metal-insulator-semiconductor structures having thin (Ga,Mn)As layers as a channel has been studied in a wide range of Mn and hole densities changed by the gate electric field. Strong and unanticipated temperature dependence, including a change of sign, of the anomalous Hall conductance $\sigma_{xy}$ has been found in samples with the highest Curie temperatures. For more disordered channels, the scaling relation between $\sigma_{xy}$ and $\sigma_{xx}$, similar to the one observed previously for thicker samples, is recovered.

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