  Though the superconducting phase of the type-II Dirac semimetal PdTe$_2$ was
shown to be conventional in nature, the phase continued to be interesting in
terms of its magnetic properties. While certain experiments indicated an
unexpected type-I superconducting phase, other experiments revealed formation
of vortices under the application of magnetic fields. Recently, scanning
tunneling spectroscopy (STS) experiments revealed the existence of a mixed
phase where type-I and type-II behaviours coexist. Here, based on our
temperature and magnetic field dependent STS experiments on Cu-intercalated
PdTe$_2$ we show that as the critical temperature of the superconducting phase
goes up from 1.7 K to 2.4 K on Cu-intercalation, the mixed phase disappears and
the system becomes homogeneously type-II. This may be attributed to an
averaging effect caused by quasiparticle exchange between type-I and type-II
domains mediated by the Cu atoms and to decreased coherence length due to
increased disorder.
