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Doping evolution of the optical scattering rate and effective mass of Bi_2Sr_(2-x)La_xCuO_6

机译:Bi_2Sr_(2-x)La_xCuO_6的光学散射速率和有效质量的掺杂演化

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摘要

We determined the optical conductivity of Bi_2Sr_(2-x)La_xCuO_6 at dopings covering the phase diagram from the underdoped to the overdoped regimes. The frequency-dependent scattering rate shows a pseudogap extending into the overdoped regime. We found that the effective mass enhancement calculated from the optical conductivity is constant throughout the phase diagram. Conversely, the effective optical charge density varies almost linearly with doping. Our results suggest that the low-frequency electrodynamics of Bi_2Sr_(2-x)La_xCuO_6 is not strongly affected by the long-range Mott transition.
机译:我们确定了Bi_2Sr_(2-x)La_xCuO_6在覆盖从低掺杂到高掺杂状态的相图时的光导率。随频率变化的散射速率显示出一个伪间隙,该伪间隙扩展到了超掺杂状态。我们发现,由光导率计算出的有效质量增强在整个相图中都是恒定的。相反,有效光电荷密度几乎随掺杂线性变化。我们的结果表明,Bi_2Sr_(2-x)La_xCuO_6的低频电动力学不受远程Mott跃迁的强烈影响。

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  • 来源
    《Physical review》 |2012年第9期|p.092504.1-092504.4|共4页
  • 作者单位

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China,LPEM, ESPCI-ParisTech, CNRS, UPMC, 10 rue Vauquelin, F-75231 Paris Cedex 5, France;

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China;

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China;

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China;

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China,National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;

    Beijing National Laboratory for Condensed Matter Physics, National Laboratory for Superconductivity, Institute of Physics,Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China;

    LPEM, ESPCI-ParisTech, CNRS, UPMC, 10 rue Vauquelin, F-75231 Paris Cedex 5, France;

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

    superconductivity phase diagrams; cuprate superconductors (high-Tc and insulating parent compounds); optical properties;

    机译:超导相图;铜酸盐超导体(高Tc和绝缘母体化合物);光学性质;

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