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Recent experiments in underdoped hole-doped cuprates have shown the presenceof two energy scales in the Raman spectrum in the superconducting state. Thisfeature has a natural explanation in some models in which pseudogap andsuperconductivity compete. In electron-doped cuprates antiferromagneticcorrelations are believed to survive in the superconducting state, and toproduce a pseudogap above the critical temperature. Contrary to hole-dopedsystems, in electron-doped compounds only one energy scale appear since thepair breaking Raman intensity peaks in both B$_{1g}$ (antinodal) and B$_{2g}$(nodal) channels at a frequency of a few meV, typical of the superconductingorder parameter. In this paper we analyze the different effect in the Ramanspectrum of the competition between pseudogap and superconductivity in electronand hole-doped cuprates. The difference in energy scales in both systems isexplained in terms of the different truncation of the Fermi surface induced bythe pseudogap. For electron-doped cuprates we also analyze the spectrum withantiferromagnetism and a non-monotonic superconducting order parameter.

Energy Scales in the Raman spectrum of electrons and hole doped cuprates within competing scenarios