  Cd3As2 is a model material of Dirac semimetal with a linear dispersion
relation along all three directions in the momentum space. The unique band
structure of Cd3As2 makes it with both Dirac and topological properties. It can
be driven into a Weyl semimetal by the symmetry breaking or a topological
insulator by enhancing the spin-orbit coupling. Here we report the temperature
and gate voltage dependent magnetotransport properties of Cd3As2 nanoplates
with Fermi level near the Dirac point. The Hall anomaly demonstrates the
two-carrier transport accompanied by a transition from n-type to p-type
conduction with decreasing temperature. The carrier-type transition is
explained by considering the temperature dependent spin-orbit coupling. The
magnetoresistance exhibits a large non-saturating value up to 2000% at high
temperatures, which is ascribed to the electron-hole compensation in the
system. Our results are valuable for understanding the experimental
observations related to the two-carrier transport in Dirac/Weyl semimetals,
such as Na3Bi, ZrTe5, TaAs, NbAs, and HfTe5.
