  We compute the transmission coefficients and zero-temperature conductance for
chiral quasiparticles propagating through various geometries, which consist of
junctions of three-dimensional nodal-point semimetals. In the first scenario,
we consider a potential step with two Rarita-Schwinger-Weyl or two birefringent
semimetals, which are tilted with respect to the other on the two sides of the
junction. The second set-up consists of a junction between a doped Dirac
semimetal and a ferromagnetic Weyl semimetal, where an intrinsic magnetization
present in the latter splits the doubly-degenerate Dirac node into a pair of
Weyl nodes. A scalar potential is also applied in the region where the Weyl
semimetal phase exists. Finally, we study sandwiches of Weyl/multi-Weyl
semimetals, with the middle region being subjected to both scalar and vector
potentials. Our results show that a nonzero transmission spectrum exists where
the areas, enclosed by the Fermi surface projections (in the plane
perpendicular to the propagation axis) of the incidence and transmission
regions, overlap. Such features can help engineer unidirectional carrier
propagation, topologically protected against impurity backscattering, because
of the chiral nature of the charge carriers.
