RIXS investigation of collective charge excitation dependency with doping level for hole-doped BSCCO

The versatility of Resonant Inelastic X-ray Scattering (RIXS) in disentangling the properties of elementary excitations is established to investigate the cuprate high-temperature superconductors (CuSC). In these materials, charge and spin degrees of freedom are intertwined and give rise to a complex phase diagram. Here, we propose RIXS experiments of both Cu L3 and O K-edges for 3 compositions of hole-doped Bi2Sr2CaCu2O8+δ (Bi2212) to examine the evolution of spin and charge excitations across the charge-ordered and Fermi liquid regions of its phase diagram. We will probe paramagnon and charge excitations with a focus on the latter, specifically on the evolution of the recently discovered acoustic plasmon branch of the charge excitations in hole-doped cuprates.