Data from \"Low-energy quasi-circular electron correlations with charge order wavelength in Bi2212\"

High-resolution resonant inelastic x-ray scattering (RIXS) data of underdoped Bi2Sr2CaCu2O8+δ (Bi2212) with Tc=54 K. We use the softening of the RIXS-measured bond stretching phonon line as a marker for the presence of dynamic electron correlations over the qx-qy scattering plane. The experiments show that these dynamic correlations exist at energies below approximately 70 meV and are centered around a quasi-circular manifold in the qx-qy scattering plane with radius equal to the magnitude of the charge order wave vector. Preprint: arXiv:2301.08415 https://arxiv.org/abs/2301.08415