Comparison of ARPES and Raman spectra

Cuprate superconductors are strongly correlated metals. In the overdoped range the electrons can be described in terms of Landau quasiparticles. They manifest themselves as well defined peaks in the angle-resolved photoemission (ARPES) spectra. Using ARPES results we can quantitatively predict the normal state Raman spectra above a doping of p∼0.21. For p<0.21 we find discrepancies between simulation and experiment in the B1g channel becoming increasingly strong for decreasing p. At optimal doping we compare ARPES data and Raman measurements also in the superconducting state. Here we use an analytic expression which reproduces the ARPES data quantitatively in the entire Brillouin zone. Similarly as in the normal state, the B2g spectra are well reproduced, while there are discrepancies in B1g symmetry.