Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor

Abstract

[This repository contains the raw data for the manuscript "<strong>Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor</strong>" (arXiv:1809.04949)] Charge density modulations are a common occurrence in all families of high critical temperature superconducting cuprates. Although consistently observed in the underdoped region of the phase diagram and at relatively low temperatures, it is still unclear to what extent they influence the unusual properties of these systems. Using resonant x-ray scattering we carefully determined the temperature dependence of charge density modulations in YBa₂Cu₃O_7-δ and Nd_1+xBa_2-xCu₃O_7-δ for several doping levels. We discovered short-range dynamical charge density fluctuations besides the previously known quasi-critical charge density waves. They persist up to well above the pseudogap temperature <em>T*</em>, are characterized by energies of few meV and pervade a large area of the phase diagram, so that they can play a key role in shaping the peculiar normal-state properties of cuprates.