Doping Evolution of the Underlying Fermi Surface in La2-xSrxCuO4

Details Doping Evolution of the Underlying Fermi Surface in La2-xSrxCuO4 Doping Evolution of the Underlying Fermi Surface in La2-xSrxCuO4

2005-10-23

arxiv.org/abs/cond-mat/0510608v1

Phys. Rev. B 74, 224510 (2006).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.74.224510

We have performed a systematic doping dependent study of La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) (0.03$\leq x \leq$0.3) by angle-resolved photoemission spectroscopy. In the entire doping range, the underlying ``Fermi surface" determined from the low energy spectral weight approximately satisfies Luttinger's theorem, even down to the lightly-doped region. This is in strong contrast to the result on Ca$_{2-x}$Na$_x$CuO$_2$Cl$_2$ (Na-CCOC), which shows a strong deviation from Luttinger's theorem. The differences between LSCO and Na-CCOC are correlated with the different behaviors of the chemical potential shift and spectral weight transfer induced by hole doping.

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