  Dust particles need to grow efficiently from micrometre sizes to thousands of
kilometres to form planets. With the growth of millimetre to meter sizes being
hindered by a number of barriers, the recent discovery that dust evolution is
able to create `self-induced' dust traps shows promises. The condensation and
sublimation of volatile species at certain locations, called snow lines, is
also thought to be an important part of planet formation scenarios. Given that
dust sticking properties change across a snow line, this raises the question:
how do snow lines affect the self-induced dust trap formation mechanism? The
question is particularly relevant with the multiple observations of the carbon
monoxide (CO) snow line in protoplanetary discs, since its effect on dust
growth and dynamics is yet to be understood. In this paper, we present the
effects of snow lines in general on the formation of self-induced dust traps in
a parameter study, then focus on the CO snow line. We find that for a range of
parameters, a dust trap forms at the snow line where the dust accumulates and
slowly grows, as found for the water snow line in previous work. We also find
that, depending on the grains sticking properties on either side of the CO snow
line, it could either be a starting or braking point for dust growth and drift.
This could provide clues to understand the link between dust distributions and
snow lines in protoplanetary disc observations.
