Electronic field effect tuning of the electronic properties of fluorinated epitaxial graphene

Ultraviolet photoemission spectroscopy measurements reveal that there is notable variation of the electron density of states in the valence band of multiple layers of fluorinated epitaxial graphene with applied electronic bias. The authors show that the tailoring of electronic band structure correlates with the decoupling of the graphene interlayers. The work function of the fluorinated graphene is tunable with the applied bias and is attributable to compensation of the fluorine-carbon dipole.