We study effects of a chiral helimagnet (CHM) on vortex states in a superconductor, solving the Ginzburg-Landau equations in a chiral helimagnet/superconductor bilayer system. We found that vortices form a periodically modulated triangular lattice, because the magnetic field from the chiral helimagnet $H_{ CHM}$ oscillates spatially. An increase of a critical current is expected, because vortices are pinned by the $H_{ CHM}$.
Categories: cond-mat.supr-con