  Magnetic skyrmions are believed to be the promising candidate of information
carriers in spintronics. However, the skyrmion Hall effect due to the
nontrivial topology of skyrmions can induce a skyrmion accumulation or even
annihilation at the edge of the devices, which hinders the real-world
applications of skyrmions. In this work, we theoretically investigate the
current-driven skyrmion motion on magnetic nanotubes which can be regarded as
"edgeless" in the tangential direction. By performing micromagnetic
simulations, we find that the skyrmion motion exhibits a helical trajectory on
the nanotube, with its axial propagation velocity proportional to the current
density. Interestingly, the skyrmion's annular speed increases with the
increase of the thickness of the nanotube. A simple explanation is presented.
Since the tube is edgeless for the tangential skyrmion motion, a stable
skyrmion propagation can survive in the presence of a very large current
density without any annihilation or accumulation. Our results provide a new
route to overcome the edge effect in planar geometries.
