2020年第81回応用物理学会秋季学術講演会

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一般セッション(口頭講演)

17 ナノカーボン » 17.2 グラフェン

[9p-Z29-1~17] 17.2 グラフェン

2020年9月9日(水) 13:30 〜 18:00 Z29

永瀬 雅夫(徳島大)、吹留 博一(東北大)

16:30 〜 16:45

[9p-Z29-12] Dominant factor of improving carrier transport properties in multilayer graphene with a turbostratic stacking

YungKai Chou1、Ryota Negishi1,5、Chaopeng Wei1、Yui Ogawa2、Yoshitaka Taniyasu2、Masashi Akabori3、Mojtahedzadeh Seyed Ali1、Nobuya Mori1、Kensaku Masuda4、Katsushi Hashimoto4、Yoshiro Hirayama4、Yoshihiro Kobayashi1 (1.Osaka Univ.、2.NTT Basic Research Lab.、3.JAIST、4.Tohoku Univ.、5.Toyo Univ.)

キーワード:graphene, turbostratic stacking, scattering length

The multilayer graphene with a turbostratic stacking structure is one of the promising materials for the electrical device because of its excellent electrical transport properties that realize the both high carrier mobility and high electrical conductance due to the same band structure as a monolayer graphene. In previous work, we analyzed the electrical transport properties of turbostratic stacking graphene, and demonstrated that elastic scattering length for multilayer graphene was significantly improved with increasing the number of layers based on the limited number of samples with 3 and 7 layers. The improvement of the electrical transport properties, especially the scattering length, should be originated from the pseudo-linear dispersion and the screening effect of multi-stacking for the charge impurities on the substrate. In this study, we fabricated additional turbostratic graphene samples with 2 and 3 layers and analyze in detail the improvement by the effects of the layer thickness for the scattering length.