  We have theoretically studied the dielectric environment effect on the
charged-impurity-limited carrier mobility of graphene double-layer structure
(GDLS) on the basis of the Boltzmann transport theory. In this system, two
graphene layers are separated by a dielectric barrier layer. It is pointed out
that the carrier mobility strongly depends on the dielectric constant of the
barrier layer when the interlayer distance becomes larger than the inverse of
the Fermi wave vector. Moreover, the conditions to improve the
charged-impurity-limited carrier mobility of the GDLS are evaluated.

Mesoscale and Nanoscale Physics;Materials Science