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Doping Evolution of the Underlying Fermi Surface in La2-xSrxCuO4

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arxiv cond-mat/0510608 v1 pith:GSGQFARM submitted 2005-10-23 cond-mat.str-el cond-mat.supr-con

T. Yoshida , X. J. Zhou , K. Tanaka , W. L. Yang , Z. Hussain , Z.-X. Shen , A. Fujimori , Seiki Komiya
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Yoichi Ando H. Eisaki T. Kakeshita S. Uchida
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classification cond-mat.str-elcond-mat.supr-con
keywords dopingfermilscoluttingerna-ccocspectralstrongsurface
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abstract

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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