  We theoretically predict spatial separation of spin-polarized ballistic
currents in transition metal dichalcogenides (TMDs) due to trigonal warping. We
quantify the effect in terms of spin polarization of charge carrier currents in
a prototypical 3-terminal ballistic device where spin-up and spin-down charge
carriers are collected by different leads. We show that the magnitude of the
current spin polarization depends strongly on the charge carrier energy and the
direction with respect to crystallographic orientations in the device. We study
the (negative) effect of lattice imperfections and disorder on the observed
spin polarization. Our investigation provides an avenue towards observing spin
discrimination in a defect-free time reversal-invariant material.
