The formation of an energy gap in graphene on ruthenium by controlling the interface

C Enderlein, Y S Kim, A Bostwick, E Rotenberg, K Horn
2010 New Journal of Physics  
We have investigated the spectral function of graphene on a monolayer of intercalated gold on Ru(0001) using angle-resolved photoemission spectroscopy (ARPES). The intercalation leads to a decoupling of the graphene film as documented by the emergence of the characteristic linear π-bands near the Fermi level. However, a band gap at the band crossing is observed. We relate this gap opening to the broken symmetry of the two carbon sublattices, induced by the special lattice mismatch of the
more » ... match of the graphene and the intercalated gold monolayer.
doi:10.1088/1367-2630/12/3/033014 fatcat:hqmia5ucr5a5fmstfepiw5eq7q