  A Weyl semimetal pierced by a screw dislocation accommodates one-dimensional
(1D) chiral states along the corresponding dislocation line. As these states
propagate in a particular direction determined by their chirality, a persistent
current (i.e., charge current in equilibrium) is expected to appear in the
interior of the system. To confirm this expectation, we numerically calculate
the charge current in a Weyl semimetal in the presence of a screw dislocation.
It is shown that a significant charge current is induced by the 1D chiral
states near the dislocation. We also analyze the spatial distribution of the
charge current focusing on the top and bottom surfaces of the system, at which
the screw dislocation is terminated, and give an overview of how the charge
current due to the dislocation is converted to that carried by other states
near the termination point of the dislocation.
