Transport Properties in Dirac semimetal ZrTe₅

We report transport measurements of Dirac semimetal ZrTe₅ single crystals. We found the anomalous peak in the temperature dependence of resistivity is the result of the Lifshitz transition, which also leads to a sign change in thermopower. Large negative longitudinal magneto-resistance is the result of the chiral magnetic effect. Magnetic field effectively transforms Dirac semimetals into Weyl semimetals by breaking time reversal symmetry. Large anomalous Hall effect observed in ZrTe₅ is the result of the Berry curvature generated by the Weyl nodes.