  Mechanism of unconventional superconductivity is still unknown even if more
than 25 years have been passed since the discovery of high-Tc cuprate
superconductors by J.G. Bednorz and K. A. Muller. Here, we explore the cuprate
phase diagram by electronic Raman spectroscopy and shed light on the
superconducting state in hole doped cuprates. Namely, how superconductivity and
the critical temperature Tc are impacted by the pseudogap.
