  The generation of a fully valley-polarized current (FVPC) in bulk graphene is
a fundamental goal in valleytronics. To this end, we investigate
valley-dependent transport through a strained graphene modulated by a finite
magnetic superlattice. It is found that this device allows a coexistence of
insulating transmission gap of one valley and metallic resonant band of the
other. Accordingly, a substantial bulk FVPC appears in a wide range of edge
orientation and temperature, which can be effectively tuned by structural
parameters. A valley-resolved Hall configuration is designed to measure the
valley polarization degree of the filtered current.
