用扫描隧道光谱研究石墨烯系统中的驻波模式

IF 2.4 3区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Vacuum Science & Technology A Pub Date : 2023-10-19 DOI:10.1116/6.0003075

Won-Jun Jang, Min Hui Chang, Min Jeong Kang, Young Jae Song, Se-Jong Kahng

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引用次数: 0

摘要

驻波模式是由于入射波和反射波的干扰而在势垒或台阶附近形成的。在扫描隧道显微镜下，石墨烯系统在原子台阶边缘、缺陷和杂质附近显示驻波模式;然而，仍有未开发的例子。在这项研究中，我们展示了化学气相沉积在六边形bn /Cu上直接生长石墨烯的实验结果。在扫描隧道显微镜和光谱学中观察到驻波模式，揭示了当费米速度约为106 m/s时的线性色散关系。我们的研究表明，在六边形bn /Cu上生长的石墨烯为研究石墨烯系统的电子特性提供了一个有用的平台。

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Standing wave patterns in graphene systems studied using scanning tunneling spectroscopy

Standing wave patterns are formed near potential barriers or steps due to the interference of incident and reflected waves. Graphene systems show standing wave patterns near atomic step edges, defects, and impurities in scanning tunneling microscopy; however, there are still unexplored examples. In this study, we present our experimental results for graphene directly grown on hexagonal-BN/Cu by chemical vapor deposition. Standing wave patterns were observed in our scanning tunneling microscopy and spectroscopy, revealing linear dispersion relations with a Fermi velocity of about 106 m/s. Our study shows that graphene grown on hexagonal-BN/Cu provides a useful platform to study the electronic characteristics of graphene systems.

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来源期刊

Journal of Vacuum Science & Technology A 工程技术-材料科学：膜

CiteScore

5.10

自引率

10.30%

发文量

247

审稿时长

2.1 months

期刊介绍： Journal of Vacuum Science & Technology A publishes reports of original research, letters, and review articles that focus on fundamental scientific understanding of interfaces, surfaces, plasmas and thin films and on using this understanding to advance the state-of-the-art in various technological applications.