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Charge ordering in La_(1.8-x)Eu_(0.2)Sr_xCuO_4 studied by resonant soft x-ray diffraction

机译:通过共振软X射线衍射研究La_(1.8-x)Eu_(0.2)Sr_xCuO_4中的电荷排序

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摘要

Resonant soft x-ray scattering with photon energies near the O K and the Cu L_3 edges was used to study the charge ordering in the system La_(1.8-x)Eu_(0.2)Sr_xCuO_4 as a function of temperature for x=0.125 and 0.15. From the superstructure diffraction intensities, a charge ordering with a doping-dependent wave vector is derived which is in this system well below the transition temperature of the low-temperature tetragonal phase but well above the onset of spin ordering. This indicates that structural changes and magnetic interactions are not in general the driving force for the formation of stripelike phases in two-dimensional-doped cuprates. Analysis of the lineshape of the scattered intensity as a function of photon energy yields evidence for a high hole concentration in the stripes.
机译:使用在O K和Cu L_3边缘附近具有光子能量的共振软X射线散射来研究系统La_(1.8-x)Eu_(0.2)Sr_xCuO_4中电荷的有序性,其随温度的变化分别为x = 0.125和0.15。从上层结构的衍射强度中,推导出具有依赖于掺杂的波矢量的电荷排序,该电荷排序在该系统中远低于低温四方相的转变温度,但远高于自旋有序的开始。这表明结构变化和磁相互作用通常不是二维掺杂的铜酸盐中形成条状相的驱动力。分析散射强度的线形与光子能量的关系,可得出条纹中空穴浓度高的证据。

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  • 来源
    《Physical review》 |2009年第10期|73-76|共4页
  • 作者单位

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany Leibniz-Institute for Solid State and Materials Research Dresden, P.O. Box 270116, D-01171 Dresden, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany;

    Leibniz-Institute for Solid State and Materials Research Dresden, P.O. Box 270116, D-01171 Dresden, Germany Department of Physics and Astronomy, University of British Coulombia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1;

    Department of Physics and Astronomy, University of British Coulombia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany;

    Department of Physics and Astronomy, University of British Coulombia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1;

    II. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Koeln, Germany National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany;

    Leibniz-Institute for Solid State and Materials Research Dresden, P.O. Box 270116, D-01171 Dresden, Germany;

    Leibniz-Institute for Solid State and Materials Research Dresden, P.O. Box 270116, D-01171 Dresden, Germany;

    Department of Physics and Astronomy, University of British Coulombia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1;

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

    charge-density-wave systems; La-based cuprates; antiferromagnetics;

    机译:电荷密度波系统;La基铜酸盐;反铁磁;

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