Fermi arcs, pseudogap and d-wave superconductivity: a fresh look at ARPES spectra on cuprates
Sorbonne University - Science and Engineering, Paris
In addition to tunneling, angle resolved photoemission spectroscopy (ARPES) has furnished clear and reproducible data on cuprates in the ground state and as a function of temperature. Recently, ARPES has confirmed the presence of a partial Fermi surface (Fermi arcs) at the critical temperature Tc and the well-known pseudogap above Tc. While there are many proposals for the enigmatic pseudogap (SC fluctuations, spin or charge ordering, etc.) a simple explanation for the Fermi arcs is completely lacking. In my talk I will discuss these issues and suggest that the preformed pair model (‘pairons’) is in good agreement with the observations.