  Dirac and Weyl semimetals are new discovered topological nontrivial materials
with the linear band dispersions around the Dirac/Weyl points. When applying
non-orthogonal electric current and magnetic field, an exotic phenomenon called
chiral anomaly arises and negative longitudinal resistance can be detected.
Recently, a new phenomenon named planer Hall effect (PHE) is considered to be
another indication of chiral anomaly which has been observed in many
topological semimetals. However, it still remains a question that is the PHE
only attributed to chiral anomaly? Here we demonstrate the PHE in a
new-discovered type-II Dirac semimetal NiTe2 by low temperature transport.
However, after detailed analysis, we conclude that the PHE results from the
trivial orbital magnetoresistance. This work reveals that PHE is not a
sufficient condition of chiral anomaly and one need to take special care of
other non-topological contribution in such studies.
