Tunable anomalous Hall effect in Dirac semimetal Cd₃As₂ nanowire

Recent years, the combination of topology and physics has led to the rapid development of topological physics. Dirac semimetal Cd₃As₂, with a pair of symmetry-protected three-dimensional Dirac cones, has drawn a lot of attention. Here, we report the experimental observation of tunable anomalous Hall effect in Cd₃As₂ nanowire. The anomalous Hall signal maximizes near the Dirac point under an applied magnetic field. As the gate voltage is tuned away from the Dirac point, the anomalous Hall signal decreases and eventually disappears. Based on the detailed analysis of the anomalous signal with gate voltage, temperature and magnetic field direction, the observed anomalous Hall effect is attributed to the Berry curvature originated from the Weyl node.