Physics – Condensed Matter – Superconductivity
Scientific paper
2006-08-18
Physics
Condensed Matter
Superconductivity
3 pages, 2 figures
Scientific paper
The Fermi surface (FS) of an extended $d-p$ Hubbard model is investigated by a two-pole approximation in both situations with hole and electron doping. Using the factorization procedure proposed by Beenen and Edwards, superconductivity with singlet $d_{x^2-y^2}$-wave pairing is considered. The effects of the $d-p$ hybridization on the FS are the main focus in the present work. Nevertheless, the asymmetries between the hole- and electron-doped regimes and the effects of doping and Coulomb interaction on FS are also investigated. Particularly, it is shown that the crossover from hole-like to electron-like FS is deeply affected by the $d-p$ hybridization in the hole-doped case. It has been verified that the effect of the hybridization is very pronounced around the saddle points $(0,\pm\pi)$ and $(\pm\pi,0)$, where the intensity of the superconducting order parameter is maximum in the particular case of $d_{x^2-y^2}$-wave symmetry. In the electron-doped case, the crossover in the FS is not verified. The doping dependence of the FS topology in the hole- and electron-doped regimes is in agreement with recent experimental ARPES results for La$_{2-x}$Sr$_{x}$CuO$_4$ (hole doping) and Nd$_{2-x}$Ce$_x$CuO$_4$ (electron doping).
Calegari E. J.
Gomes A. A.
Magalhães S. G.
No associations
LandOfFree
Effects of the Hybridization on the Fermi Surface of an Extended $d-p$ Hubbard Model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of the Hybridization on the Fermi Surface of an Extended $d-p$ Hubbard Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of the Hybridization on the Fermi Surface of an Extended $d-p$ Hubbard Model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-567305