  The electronic transport properties of single layer graphene having a dilute
coating of indium adatoms has been investigated. Our studies establish that
isolated indium atoms donate electrons to graphene and become a source of
charged impurity scattering, affecting the conductivity as well as
magnetotransport properties of the pristine graphene. Notably, a positive
magnetoresistance is observed over a wide density range after In doping. The
low field magnetoresistance carries signatures of quantum interference effects
which are significantly altered by the adatoms.
