  Besides superconductivity, copper-oxide high temperature superconductors are
susceptible to other types of ordering. We use scanning tunneling microscopy
and resonant elastic x-ray scattering measurements to establish the formation
of charge ordering in the high-temperature superconductor Bi2Sr2CaCu2O8+x.
Depending on the hole concentration, the charge ordering in this system occurs
with the same period as those found in Y-based or La-based cuprates, and
displays the analogous competition with superconductivity. These results
indicate the similarity of charge organization competing with superconductivity
across different families of cuprates. We observe this charge ordering to leave
a distinct electron-hole asymmetric signature (and a broad resonance centered
at +20 meV) in spectroscopic measurements, thereby indicating that it is likely
related to the organization of holes in a doped Mott insulator.
