Engineering Robust Metallic Zero-Mode States in Olympicene Graphene Nanoribbons.

Autor: McCurdy RD; Department of Chemistry, University of California, Berkeley, California 94720, United States., Delgado A; Department of Chemistry, University of California, Berkeley, California 94720, United States., Jiang J; Department of Physics, University of California, Berkeley, California 94720, United States.; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States., Zhu J; Department of Chemistry, University of California, Berkeley, California 94720, United States., Wen ECH; Department of Chemistry, University of California, Berkeley, California 94720, United States., Blackwell RE; Department of Chemistry, University of California, Berkeley, California 94720, United States., Veber GC; Department of Chemistry, University of California, Berkeley, California 94720, United States., Wang S; Department of Chemistry, University of California, Berkeley, California 94720, United States., Louie SG; Department of Physics, University of California, Berkeley, California 94720, United States.; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States., Fischer FR; Department of Chemistry, University of California, Berkeley, California 94720, United States.; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.; Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.; Bakar Institute of Digital Materials for the Planet, Division of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States.
Jazyk: angličtina
Zdroj: Journal of the American Chemical Society [J Am Chem Soc] 2023 Jul 19; Vol. 145 (28), pp. 15162-15170. Date of Electronic Publication: 2023 Jul 10.
DOI: 10.1021/jacs.3c01576
Abstrakt: Metallic graphene nanoribbons (GNRs) represent a critical component in the toolbox of low-dimensional functional materials technology serving as 1D interconnects capable of both electronic and quantum information transport. The structural constraints imposed by on-surface bottom-up GNR synthesis protocols along with the limited control over orientation and sequence of asymmetric monomer building blocks during the radical step-growth polymerization have plagued the design and assembly of metallic GNRs. Here, we report the regioregular synthesis of GNRs hosting robust metallic states by embedding a symmetric zero-mode (ZM) superlattice along the backbone of a GNR. Tight-binding electronic structure models predict a strong nearest-neighbor electron hopping interaction between adjacent ZM states, resulting in a dispersive metallic band. First-principles density functional theory-local density approximation calculations confirm this prediction, and the robust, metallic ZM band of olympicene GNRs is experimentally corroborated by scanning tunneling spectroscopy.
Databáze: MEDLINE
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