Gap and pseudogap evolution within the charge-ordering scenario for superconducting cuprates

Details Gap and pseudogap evolution within the charge-ordering scenario for superconducting cuprates Gap and pseudogap evolution within the charge-ordering scenario for superconducting cuprates

2000-02-16

arxiv.org/abs/cond-mat/0002250v2

Eur. Phys. J. B, 71 (2000), pag. 95

Physics

Condensed Matter

Superconductivity

13 pages (EPY style), 7 enclosed figures, to appear on Eur. Phys. J. B

Scientific paper

10.1007/s100510070163

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-parameter 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-T_c superconductors, we reproduce also the T_c-T^* 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.

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