Structural and electronic inhomogeneity of graphene revealed by Nano-ARPES

Chaoyu Chen (1) , José Avila (1) , Hakim Arezki (2) , Fei Yao (3) , van Luan Nguyen (4) , Young Hee Lee (5, 6) , Mohamed Boutchich (2) , Maria C. Asensio (1)

1 SSOLEIL - Synchrotron SOLEIL
2 GeePs - Laboratoire Génie électrique et électronique de Paris
3 Center for Integrated Nanostructure Physics, Institute for Basic Science
4 SKKU - Sungkyunkwan University [Suwon]
5 Department of Energy Science
6 Center for Integrated Nanostructure Physics, Institute for Basic Science

Electronic structure describes the distribution of electronic states in reciprocal space, being one of the most fundamental concepts in condensed matter physics, since it determines the electrical, optical and magnetic behaviours of materials. Due to its two-dimensional honeycomb lattice with covalent bonding, pristine graphene exhibits unsurpassed in-plane stiffness and stable structural properties. Here by employing angle-resolved photoemission spectroscopy with spatial resolution ∼ 100 nm (Nano-ARPES), we discuss in detail the structural and electronic properties of graphene grown on cooper by chemical vapour deposition (CVD). Our results reveal the spatial inhomogeneity of graphene film, demonstrating the power of Nano-ARPES to detect the microscopic inhomogeneity of electronic structure for different materials.

Domaines: Physique [physics]; Sciences de l'ingénieur [physics]

Chaoyu Chen, José Avila, Hakim Arezki, Fei Yao, van Luan Nguyen, et al.. Structural and electronic inhomogeneity of graphene revealed by Nano-ARPES. Journal of Physics: Conference Series, 2017, 864, ⟨10.1088/1742-6596/864/1/012029⟩. ⟨hal-01631649⟩