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arXiv 2302.08446cond-mat.mtrl-sci
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在Olympicene石墨烯纳米带中设计鲁棒金属零模态

Engineering Robust Metallic Zero-Mode States in Olympicene Graphene Nanoribbons

Ryan D. McCurdy, Aidan Delgado, Jingwei Jiang, Junmian Zhu, Ethan Chi Ho Wen, Raymond E. Blackwell, Gregory C. Veber, Shenkai Wang, Steven G. Louie, Felix R. Fischer

摘要:

金属石墨烯纳米带(GNR)是低维功能材料技术工具箱中的关键组成部分,可作为一维互连,实现电子和量子信息传输。由表面上自下而上GNR合成方案施加的结构约束以及在自由基逐步生长聚合期间对不对称单体结构单元的取向和序列的有限控制一直困扰着金属GNR的设计和组装。在这里,我们报告的GNR托管强大的金属态的区域规则的合成通过嵌入一个对称的零模超晶格沿GNR的骨干。紧束缚电子结构模型预测,在相邻的零模状态之间的一个强大的最近邻电子跳跃的相互作用,导致在一个分散的金属带。第一性原理DFT-LDA计算证实了这一预测,并通过扫描隧道光谱实验证实了奥林匹森GNRs(oGNRs)的稳健金属零模带。

英文摘要:

Metallic graphene nanoribbons (GNRs) represent a critical component in the toolbox of low-dimensional functional materials technolo-gy 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 has 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 superlattice along the backbone of a GNR. Tight-binding electronic structure models predict a strong nearest-neighbor electron hopping interaction between adjacent zero-mode states resulting in a dispersive metallic band. First principles DFT-LDA calculations confirm this prediction and the robust, metallic zero-mode band of olympicene GNRs (oGNRs) is experimentally corroborated by scanning tunneling spectroscopy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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