  This work analyzes the propagation of a transverse domain wall (DW) motion
under the action of an electric current along a nanowire (NW) with a curvature
gradient. Our results evidence that the curvature gradient induces a chiral
spin-transfer torque (CSTT) whose effect on the DW motion depends on the
direction along which the DW points. The origin of the CSTT is explained in
terms of a position and phase-dependent effective field associated with the DW
profile and the electric current direction. Finally, our results reveal that
this chiral mechanism can also affect the behavior of other magnetization
collective modes, such as spin waves. This work shows the emergence of
curvature-induced chiral spin transport and highlights a new phenomenon to be
considered for designing spintronic devices.
