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Doping evolution of Zhang-Rice singlet spectral weight: A comprehensive examination by x-ray absorption spectroscopy

机译:张米单重态光谱重量的掺杂演变:X射线吸收光谱法的全面检查

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摘要

The total spectral weight S of the emergent low-energy quasiparticles in high-temperature superconductors (HTSCs) is explored by x-ray absorption spectroscopy. In order to examine the applicability of the Hubbard model, regimes that cover from zero doping to overdoping are investigated. In contrast to results of mean-field theory, we found that S deviates from linear dependence on the doping level p. The slope of 5 versus p changes continuously throughout the whole doping range with no sign of saturation up to p = 0.23. Therefore, the picture of the Zhang-Rice singlet remains intact within the most prominent doping regimes of HTSCs.
机译:通过X射线吸收光谱研究了高温超导体(HTSCs)中出现的低能准粒子的总谱重S。为了检查Hubbard模型的适用性,研究了从零掺杂到过量掺杂的各种机制。与平均场理论的结果相反,我们发现S偏离了掺杂水平p的线性依赖性。 5相对于p的斜率在整个掺杂范围内连续变化,直到p = 0.23为止没有饱和迹象。因此,在HTSC最突出的掺杂方案中,Zhang-Rice单线态的图片仍然完整。

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  • 来源
    《Physical review》 |2013年第13期|134525.1-134525.5|共5页
  • 作者单位

    Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan;

    Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan;

    Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan;

    Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA;

    Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan;

    National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan;

    National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan;

    Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan;

    Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan;

    Department of Physics, National Tsing Hua University, Hsinchu 30043, Taiwan,Physics Division, National Center for Theoretical Sciences, P. O. Box 2-131, Hsinchu, Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cuprate superconductors (high-Tc and insulating parent compounds); lattice fermion models (hubbard model, etc.); theories and models of superconducting state; X-ray absorption spectra;

    机译:铜酸盐超导体(高Tc和绝缘母体化合物);格子费米子模型(哈伯德模型等);超导状态的理论和模型;X射线吸收光谱;

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