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By employing non-equilibrium Green’s function combined with the spin-polarized density-functional theory,we investigate the spin-dependent electronic transport properties of armchair arsenene nanoribbons (aAsNRs).Our results show that the spin-metal and spin-semiconductor properties can be observed in aAsNRs with different widths.We also find that there is nearly 100％ bipolar spin-filtering behavior in the aAsNR-based device with antiparallel spin configuration.Moreover,rectifying behavior and giant magnetoresistance are found in the device.The corresponding physical analyses have been given.