Anomalous conductivity tensor in the Dirac semimetal Na3Bi Jun Xiong, Satya Kushwaha, Jason Krizan, Tian Liang, R. J. Cava and N. P. Ong EPL, 114 2 (2016) 27002 Published online: 11 May 2016 DOI: 10.1209/0295-5075/114/27002