We study fluctuations of the conductance of micron-sized graphene devices as a function of
the Fermi energy and magnetic field. The fluctuations are studied in combination with
analysis of weak localization which is determined by the same scattering mechanisms. It is
shown that the variance of conductance fluctuations depends not only on inelastic scattering
that controls dephasing but also on elastic scattering. In particular, contrary to its effect on
weak localization, strong intervalley scattering suppresses conductance fluctuations in …