▎ 摘　　要

We study charge and spin transport along grain boundaries in single layer graphene in the presence of a quantizing perpendicular magnetic field. Transport states in a grain boundary are produced by the hybridization of Landau zero modeswith interfacial states. In selected energy regimes quantum Hall edge states can be deflected either fully or partially into grain boundary states. The degree of edge state deflection is studied in the nonlocal conductance and in the shot noise. We also consider the possibility of grain boundaries as gate-switchable spin filters, a functionality enabled by counterpropagating transport channels laterally confined in the grain boundary.