An Analysis of the Fermi Surface of Hole-Doped Type Cuprate Superconductor

Abstract

In order to investigate the doping dependence of Fermi surface (DDFS) of cuprate, we have constructed a mean field model for the electronic structure of cuprate as an effective theory of strongly correlated system. Empirical parameters involved there were determined to reproduce the experimental data of the Hall coefficient. Obtained result for the DDFS is that the Fermi surface forms hole pockets in underdoped regime, which become larger in the optimum-doped regime, and the outer part in the Brillouin zone centered at X-point approaches a large circle in the heavily overdoped regime. However, the inner structure of Fermi surface always remains. The change of Fermi surface by doping amount is a continuous deformation throughout the whole regime. It is suggested that the experimental study of the higher vacant band relevant to the photo-absorbed excited state is important to select from among scenarios on the Fermi surface of cuprate.