Na3Bi is a Dirac semimetal with protected nodes that may be sensitive to the breaking of time-reversal invariance in a magnetic field B. We report experiments which reveal that both the conductivity and resistivity tensors exhibit robust anomalies in B. The resistivity φxx is B-linear up to 35 T, while the Hall angle exhibits an unusual profile approaching a step function. The conductivities σxx and σxy share identical power-law dependences at large B. We propose that these significant deviations from conventional transport result from an unusual sensitivity of the transport lifetime to B. The transport features are compared with those in Cd3As2.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)