A Tunable Anomalous Hall Effect in a Non-Ferromagnetic System

Details A Tunable Anomalous Hall Effect in a Non-Ferromagnetic System A Tunable Anomalous Hall Effect in a Non-Ferromagnetic System

2005-12-30

arxiv.org/abs/cond-mat/0512730v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.96.196404

We measure the low-field Hall resistivity of a magnetically-doped two-dimensional electron gas as a function of temperature and electrically-gated carrier density. Comparing these results with the carrier density extracted from Shubnikov-de Haas oscillations reveals an excess Hall resistivity that increases with decreasing temperature. This excess Hall resistivity qualitatively tracks the paramagnetic polarization of the sample, in analogy to the ferromagnetic anomalous Hall effect. The data are consistent with skew-scattering of carriers by disorder near the crossover to localization.

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