  The high-temperature superconductivity in copper oxides emerges under strong
influence of spin correlations in doped Mott insulators. Recent discoveries of
charge-order (CO) correlations in Y-based hole-doped cuprates as well as in
electron-doped cuprates suggest that charge correlations should also play an
important role on the electronic states of cuprates, although those
correlations have been so far detected mainly by x-ray scattering measurements.
Here we show signatures of CO correlations in transport properties of
electron-doped cuprates as anomalous enhancement of the metal-to-insulator
crossover temperature (Tmin) appears in the limited doping range near the onset
of superconductivity, while it decreases exactly when superconductivity sets
in. We explain this non-monotonous peak-like behavior of Tmin in terms of the
evolution of the electronic states through development of CO correlations and
appearance of the hole pockets in the folded Fermi surface, which impact on
transport properties consecutively at different locations in the momentum
space.
