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We explored by electronic Raman scattering the superconducting state ofBi-2212 single crystal by performing a fine tuned doping study. We found threedistinct energy scales in A1g, B1g and B2g symmetries which show three distinctdoping dependencies. Above p=0.22 the three energies merge, below p=0.12, theA1g scale is no more detectable while the B1g and B2g scales become constant inenergy. In between, the A1g and B1g scales increase monotonically withunder-doping while the B2g one exhibits a maximum at p=0.16. The threesuperconducting energy scales appear to be an universal feature of hole-dopedcuprates. We propose that the non trivial doping dependence of the three scalesoriginates from Fermi surface topology changes and reveals competing ordersinside the superconducting dome.

Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering