Inducing metallicity in graphene nanoribbons via zero-mode superlattices

doi:10.1126/science.aay3588

GSTDTAP > 气候变化

DOI	10.1126/science.aay3588
	Inducing metallicity in graphene nanoribbons via zero-mode superlattices
	Daniel J. Rizzo; Gregory Veber; Jingwei Jiang; Ryan McCurdy; Ting Cao; Christopher Bronner; Ting Chen; Steven G. Louie; Felix R. Fischer; Michael F. Crommie
	2020-09-25
发表期刊	Science
出版年	2020
英文摘要	In its usual two-dimensional form, graphene does not have an energy gap in its electronic structure. However, one-dimensional ribbons made of the material are semiconducting and making them metallic is tricky. Rizzo et al. developed a strategy for synthesizing metallic graphene nanoribbons and demonstrated their metallicity using scanning tunneling spectroscopy. These metallic graphene nanoribbons may be useful for exploring exotic quantum phases in a single dimension. Science , this issue p. [1597][1] The design and fabrication of robust metallic states in graphene nanoribbons (GNRs) are challenging because lateral quantum confinement and many-electron interactions induce electronic band gaps when graphene is patterned at nanometer length scales. Recent developments in bottom-up synthesis have enabled the design and characterization of atomically precise GNRs, but strategies for realizing GNR metallicity have been elusive. Here we demonstrate a general technique for inducing metallicity in GNRs by inserting a symmetric superlattice of zero-energy modes into otherwise semiconducting GNRs. We verify the resulting metallicity using scanning tunneling spectroscopy as well as first-principles density-functional theory and tight-binding calculations. Our results reveal that the metallic bandwidth in GNRs can be tuned over a wide range by controlling the overlap of zero-mode wave functions through intentional sublattice symmetry breaking. [1]: /lookup/doi/10.1126/science.aay3588
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/296504
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Daniel J. Rizzo,Gregory Veber,Jingwei Jiang,et al. Inducing metallicity in graphene nanoribbons via zero-mode superlattices[J]. Science,2020.
APA	Daniel J. Rizzo.,Gregory Veber.,Jingwei Jiang.,Ryan McCurdy.,Ting Cao.,...&Michael F. Crommie.(2020).Inducing metallicity in graphene nanoribbons via zero-mode superlattices.Science.
MLA	Daniel J. Rizzo,et al."Inducing metallicity in graphene nanoribbons via zero-mode superlattices".Science (2020).