Long-Range Gating in Single-Molecule One-Dimensional Topological Insulators.

Autor:	Li L; Department of Chemistry, Columbia University, New York, New York 10027, United States., Louie S; Department of Chemistry, Columbia University, New York, New York 10027, United States., Orchanian NM; Department of Chemistry, Columbia University, New York, New York 10027, United States., Nuckolls C; Department of Chemistry, Columbia University, New York, New York 10027, United States., Venkataraman L; Department of Chemistry, Columbia University, New York, New York 10027, United States.; Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States.
Jazyk:	angličtina
Zdroj:	Journal of the American Chemical Society [J Am Chem Soc] 2024 Jun 04. Date of Electronic Publication: 2024 Jun 04.
DOI:	10.1021/jacs.4c05699
Abstrakt:	Single-molecule one-dimensional topological insulator (1D TI) is a class of molecular wires that exhibit increasing conductance with wire length. This unique trend is due to the coupling between the two low-lying topological edge states of 1D TIs described by the Su-Schrieffer-Heeger model. In principle, this quantum phenomenon within 1D TIs can be utilized to achieve long-range gating in molecular conductors. Here, we study electron transport through a single-edge state of doubly oxidized oligophenylene bis(triarylamine) to understand the effect of the edge state coupling on conductance. We find that conductance is elevated by approximately 1 order of magnitude compared to a control molecule with the same conductance pathway. Density function theory calculations further support that the increase in conductance is due to the interaction between the edge states of 1D TIs. This work demonstrates a new gating paradigm in molecular electronics, while also providing a deeper understanding of how edge states interact and affect electron transport within 1D TIs.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu