Systematic doping evolution of the underlying Fermi surface of La2-xSrxCuO4
Systematic doping evolution of the underlying Fermi surface of La2-xSrxCuO4
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DOI：
10.1103/physrevb.74.224510
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发表时间：
2005-10
影响因子：
3.7
通讯作者：
T. Yoshida;T. Yoshida;X. Zhou;K. Tanaka;Wanli Yang;Z. Hussain;Zhixuan Shen;A. Fujimori;
中科院分区：
文献类型：
--
作者：
T. Yoshida;T. Yoshida;X. Zhou;K. Tanaka;Wanli Yang;Z. Hussain;Zhixuan Shen;A. Fujimori;
我们用角度分辨光电子能谱系统地研究了${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$(LSCO)$(0.03\ensuremath{\leqslant}x\ensuremath{\leqslant}0.3)$的掺杂效应。在整个掺杂范围内，由低能谱权重确定的基本‘费米面’近似满足Luttinger定理，甚至低至轻掺杂区域。这与在${\mathrm{Ca}}_{2\ensuremath{-}x}{\mathrm{Na}}_{x}\mathrm{Cu}{\mathrm{O}}_{2}{\mathrm{Cl}}_{2}$(Na-Ccoc)上的结果形成了强烈的对比，后者明显偏离了Luttinger定理。我们将LSCO和Na-CCOC之间的这些差异与空穴掺杂引起的化学势移动和光谱重量转移行为的不同联系起来。
We have performed a systematic doping-dependent study of ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$ (LSCO) $(0.03\ensuremath{\leqslant}x\ensuremath{\leqslant}0.3)$ by angle-resolved photoemission spectroscopy. Over this 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 results on ${\mathrm{Ca}}_{2\ensuremath{-}x}{\mathrm{Na}}_{x}\mathrm{Cu}{\mathrm{O}}_{2}{\mathrm{Cl}}_{2}$ (Na-CCOC), which show a clear deviation from Luttinger's theorem. We correlate these differences between LSCO and Na-CCOC with differences in the behavior of chemical potential shift and spectral weight transfer induced by hole doping.