Ubiquitous Interplay between Charge Ordering and High-Temperature Superconductivity in Cuprates

摘要

Besides superconductivity, copper-oxide high temperature superconductors aresusceptible to other types of ordering. We use scanning tunneling microscopyand resonant elastic x-ray scattering measurements to establish the formationof charge ordering in the high-temperature superconductor Bi2Sr2CaCu2O8+x.Depending on the hole concentration, the charge ordering in this system occurswith the same period as those found in Y-based or La-based cuprates, anddisplays the analogous competition with superconductivity. These resultsindicate the similarity of charge organization competing with superconductivityacross different families of cuprates. We observe this charge ordering to leavea distinct electron-hole asymmetric signature (and a broad resonance centeredat +20 meV) in spectroscopic measurements, thereby indicating that it is likelyrelated to the organization of holes in a doped Mott insulator.