Correlation between morphology and transport properties of   quasi-free-standing monolayer graphene
  We investigate the morphology of quasi-free-standing monolayer graphene (QFMLG) formed at several temperatures by hydrogen intercalation and discuss its relationship with transport properties. Features corresponding to incomplete hydrogen intercalation at the graphene-substrate interface are observed by scanning tunneling microscopy on QFMLG formed at 600 and 800{\deg}C. They contribute to carrier scattering as charged impurities. Voids in the SiC substrate and wrinkling of graphene appear at 1000{\deg}C, and they decrease the carrier mobility significantly. 
Yuya Murata, Torge Mashoff, Makoto Takamura, Shinichi Tanabe, Hiroki   Hibino, Fabio Beltram, and Stefan Heun
cond-mat.mes-hall cond-mat.mtrl-sci