arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.01920cond-mat.mtrl-scicond-mat.mes-hall
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高真空直接键合法制备扭曲双层石墨烯

Twisted bilayer graphene fabricated by direct bonding in a high vacuum

Hitoshi Imamura, Anton Visikovskiy, Ryosuke Uotani, Takashi Kajiwara, Hiroshi Ando, Takushi Iimori, Kota Iwata, Toshio Miyamachi, Kan Nakatsuji, Kazuhiko Mase, … 展开作者

Hitoshi Imamura, Anton Visikovskiy, Ryosuke Uotani, Takashi Kajiwara, Hiroshi Ando, Takushi Iimori, Kota Iwata, Toshio Miyamachi, Kan Nakatsuji, Kazuhiko Mase, Tetsuroh Shirasawa, Fumio Komori, Satoru Tanaka

摘要:

扭曲双层石墨烯(Twistedbilayergraphene,TBG)是由两个单层石墨烯以面内旋转角度堆叠而成的,由于其独特的电子结构而成为近年来的研究热点。TBG通常在空气中通过机械剥离和转移石墨烯薄片的撕裂和堆叠方法产生,通过该方法难以获得相当大的毫米级面积和重要的层间清洁界面。在这项研究中,我们解决了这些问题,通过直接转移的CVD生长的石墨烯在SiC衬底上剥离到石墨烯在高真空中,而不使用任何转移辅助介质和观察到的电子带调制由于强烈的层间耦合。

英文摘要:

Twisted bilayer graphene (TBG), in which two monolayer graphene are stacked with an in-plane rotation angle, has recently become a hot topic due to unique electronic structures. TBG is normally produced in air by the tear-and-stack method of mechanical exfoliation and transferring graphene flakes, by which a sizable, millimeter-order area, and importantly clean interface between layers are hard to obtain. In this study, we resolved these problems by directly transferring the easy-to-exfoliate CVD-grown graphene on SiC substrate to graphene in a high vacuum without using any transfer assisting medium and observed electronic band modulations due to the strong interlayer coupling.

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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