[16a-Z31-1~11] 17.2 Graphene

[16a-Z31-2] Origin of Energy Gap of Graphene Grown on Hex-Au(001) Substrate

〇Tomoo Terasawa^1,2, Satoshi Yasuda¹, Kasuya Matsunaga³, Naoki Hayashi³, Shin-ichiro Tanaka⁴, Wataru Norimatsu³, Takahiro Ito^3,5, Shinichi Machida¹, Hidehito Asaoka¹ (1.ASRC, JAEA, 2.Univ. of Tokyo, 3.Nagoya Univ., 4.Osaka Univ., 5.NUSR)

Keywords:graphene, energy gap, ARPES

Graphene grown on Hex-Au(001) substrate shows an energy gap in its pi-band. Previous reports speculated that the periodic potential of Hex-Au(001) resulted in the energy gap formation in the pi-band of graphene. In the present study, we found by angle-resolved photoemission spectroscopy that the hybridyzation of sp-band of Hex-Au(001) and pi-band of graphene created the energy gap in the pi-band of graphene.