▎ 摘　　要

Using the first-principles calculation, we have shown that armchair graphene nanoribbons (aGNR) exhibit highly spin-polarized transport by forming heterobilayers with one-dimensional ruthenium porphyrin tapes (Ru-PPTs). Due to stronger electronic coupling, the bilayer formation between aGNRs and doubly-linked (DL) Ru-PPTs is stronger than that between aGNRs and triply-linked (TL) Ru-PPTs. While the TL bilayer is a quasi-metal, the DL bilayer preserves the half-metallic character of the underlying DL Ru-PPT. At an applied bias of 0.1 V, the conductance of the DL heterobilayer is 99.7% spin-polarized. (C) 2012 Elsevier B. V. All rights reserved.