▎ 摘　　要

Flower defect in graphene is observed in the experiment and can be generated by electron beam exposure. In this work, we investigate the spin-polarized transport through zigzag graphene nanoribbons containing a flower defect by using nonequilibrium Green's functions in combination with the density functional theory. We found high spin polarization in Zigzag Graphene Nanoribbon (ZGNR) with a flower defect. The dependence of spin polarization on the width of ZGNR is also studied. The underlying mechanism is analyzed through the flower defect-induced different distributions of spin up and spin down local density of states.