Precise Quantization of the Anomalous Hall Effect near Zero Magnetic Field
Precise Quantization of the Anomalous Hall Effect near Zero Magnetic Field
We report a nearly ideal quantum anomalous Hall effect in a three-dimensional topological insulator thin film with ferromagnetic doping. Near zero applied magnetic field we measure exact quantization in Hall resistance to within a part per 10,000 and longitudinal resistivity under 1 ohm per square, with chiral edge transport explicitly …