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首页> 外文期刊>Physical review >Effects of nonmagnetic La impurities on the spin resonance of Ce_(1-x)La_xCoIn_5 single crystals as seen via inelastic neutron scattering
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Effects of nonmagnetic La impurities on the spin resonance of Ce_(1-x)La_xCoIn_5 single crystals as seen via inelastic neutron scattering

机译:非弹性中子散射对非磁性La杂质对Ce_(1-x)La_xCoIn_5单晶自旋共振的影响

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摘要

The influence of La nonmagnetic impurities on the spin dynamics of CeCoIn_5 was studied by inelastic neutron scattering. In La-substituted systems, the spin resonance peak (observed at Ω_(res) = 0.55 meV in the pure system) is shifted to lower energies but the ratio Ω_(res)/k_BT_C remains almost unchanged. The excitation broadens up to an energy of 0.3 meV which is equal to the value of the quasielastic signal in the normal state. The evolution of the excitation as a function of La substitution is compared with Ni- and Zn-substituted YBa_2Cu_3O7.
机译:通过非弹性中子散射研究了La非磁性杂质对CeCoIn_5自旋动力学的影响。在La取代的系统中,自旋共振峰(在纯系统中以Ω_(res)= 0.55 meV观察到)转移到较低的能量,但比率Ω_(res)/ k_BT_C几乎保持不变。激发信号加宽到0.3 meV的能量,该能量等于正常状态下的准弹性信号的值。将激发演化与La取代的函数进行了比较,并与Ni和Zn取代的YBa_2Cu_3O7进行了比较。

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  • 来源
    《Physical review》 |2011年第5期|p.052505.1-052505.4|共4页
  • 作者单位

    CEA-Grenoble, INAC-SPSMS-MDN, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-Grenoble, INAC-SPSMS-MDN, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-Grenoble, INAC-SPSMS-MDN, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-Grenoble, INAC-SPSMS-MDN, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France;

    Laboratoire Leon Brillouin, CEAISaclay, CEA-CNRS, 91191 Gifsur Yvette, France;

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

    heavy-fermion superconductors; neutron inelastic scattering;

    机译:重金属超导体;中子非弹性散射;

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