https://doi.org/10.1007/s100510070163
Gap and pseudogap evolution within the charge-ordering scenario for superconducting cuprates
Dipartimento di Fisica, Università di Roma "La Sapienza",
Piazzale Aldo Moro 5, 00185 Roma, Italy
and Istituto Nazionale per la Fisica della Materia,
Unità di Roma 1, Piazzale Aldo Moro 5, 00185 Roma, Italy
Received:
17
February
2000
Published online: 15 September 2000
We describe the spectral properties of underdoped cuprates as
resulting from a momentum-dependent pseudogap in the normal-state
spectrum. Such a model accounts, within a BCS approach, for the doping
dependence of the critical temperature and for the two-pa rameter
leading-edge shift observed in the cuprates.
By introducing a phenomenological temperature
dependence of the pseudogap, which finds a natural interpretation within
the stripe quantum-critical-point scenario for high-Tc superconductors,
we reproduce also the 
bifurcation near optimum doping. Finally,
we briefly discuss the different role of the gap and the pseudogap in
determining the spectral and thermodynamical properties of the model
at low temperatures.
PACS: 74.25.Dw – Superconductivity phase diagrams / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 74.20.Fg – BCS theory and its development
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
