Coupling and Decoupling of Bilayer Graphene Monitored by Electron Energy Loss Spectroscopy

Lin Yung-Chang; Motoyama Amane; Solis-Fernandez PabloMatsumoto RikaAgo HirokiSuenaga Kazu

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Coupling and Decoupling of Bilayer Graphene Monitored by Electron Energy Loss Spectroscopy

机译：Coupling and Decoupling of Bilayer Graphene Monitored by Electron Energy Loss Spectroscopy

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摘要

We studied the interlayer coupling and decoupling of bilayer graphene (BLG) using spatially resolved electron energy loss spectroscopy with a monochromated electron source. We correlated the twist-angle-dependent energy band hybridization with Moire super-lattices and the corresponding optical absorption peaks. The optical absorption peak originates from the excitonic transition between the hybridized van Hove singularities (vHSs), which shifts systematically with the twist angle. We then proved that the BLG decouples when a monolayer of metal chloride is intercalated in its van der Waals gap and results in the elimination of the vHS peak.

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《Nano letters》 |2021年第24期|10386-10391|共6页
作者
Lin Yung-Chang; Motoyama Amane; Solis-Fernandez PabloMatsumoto RikaAgo HirokiSuenaga Kazu;
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作者单位

Natl Inst Adv Ind Sci & Technol;

Kyushu Univ;

Tokyo Polytech Univ;

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原文格式 PDF
正文语种英语
中图分类特种结构材料;物理化学（理论化学）、化学物理学;
关键词
twisted bilayer graphene; optical absorption; van Hove singularity; metal chloride intercalation; EELS; VAN-HOVE SINGULARITIES; SUPERCONDUCTIVITY;

Coupling and Decoupling of Bilayer Graphene Monitored by Electron Energy Loss Spectroscopy

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