Probing Competing and Intertwined Orders with Resonant Inelastic x-ray   Scattering in the Hole-Doped Cuprates
  We develop a formalism to study indirect resonant inelastic x-ray scattering (RIXS) in systems with itinerant electrons, accounting for the attraction between valence electrons and the positively-charged core hole exactly, and apply this formalism to the hole-doped cuprate superconductors. We focus on the relationship between RIXS lineshapes and band structure, including broken symmetries. We show that RIXS is capable of distinguishing between competing order parameters, establishing it as a useful probe of the pseudogap phase. 
David Benjamin, Israel Klich, Eugene Demler
cond-mat.str-el