[9p-Z29-1~17] 17.2 Graphene

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

〇YungKai Chou¹, Ryota Negishi^1,5, 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.)

Keywords: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.