Synthesis of Metal-Semiconductor Heterojunctions in Single Graphene Nanoribbons
Researchers synthesized atomically precise graphene nanoribbons (GNRs) that can be switched from semiconducting to metallic states using STM tip manipulation to cleave hydrogen atoms. This created a single-GNR metal-semiconductor heterojunction where the metallic segment has two dispersive bands crossing the Fermi level, suggesting a pathway for low-barrier p-type contacts.