BaDElPh Highlights

Angle-resolved photoemission spectroscopy (ARPES) reveals no hybridization between electronic states of graphene and MoS₂ monolayer grown by molecular beam epitaxy (MBE), through coevaporation of Mo and S from pyrite, on graphene/Ir(111). The valence band (VB) maximum of MoS₂ appears at the K-point of the Brillouin zone consistent with monolayer MoS₂, while for bilayer MoS₂ the VB maximum is at the Γ point. The splitting of the VB at the MoS₂ K-point due to spin–orbit interaction is clearly seen in the high resolution scan shown in the inset of the figure. The fit to the energy distribution curve from a cut through the MoS₂ K-point reveals a band splitting due to spin–orbit coupling (SOC) of 144 meV. Interestingly, graphene is more hole doped than it was before MoS₂ growth, the Dirac-point binding energy E_D is evaluated to be at −0.25 eV compared to −0.1 eV in the pristine case. Notably, ARPES does not show any hybridization