Fig. 7From: Electronic Properties of Armchair Black Phosphorene Nanoribbons Edge-Modified by Transition Elements V, Cr, and Mna The spin-dependent I-V characteristic of a Mn/Cr-9-APNR heterojunction. The geometry of the two-probe system is shown in the upper inset. The lower insets scheme the alignments of electrode energy bands for negative and positive biases. b The corresponding rectification ratio α is plotted versus the bias magnitudeBack to article page