Zn-induced spin dynamics in overdoped La_<2-x>Sr_xCu_<1-y>Zn_yO_4
Zn-induced spin dynamics in overdoped La_<2-x>Sr_xCu_<1-y>Zn_yO_4
复制标题
过掺杂 La_<2-x>Sr_xCu_<1-y>Zn_yO_4 中 Zn 诱导的自旋动力学
DOI：
10.1103/physrevb.85.014507
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and R. J. Birgeneau
中科院分区：
文献类型：
--
作者：
S. D. Wilson;Z. Yamani;C. Dhital;B. Freelon;P. G. Freeman;J. A. Fernandez-Baca;K. Yamada;S. Wakimoto;W. J. L. Buyers;and R. J. Birgeneau
用非弹性中子散射技术测量了等离子体Zn取代的LaSrCuZnO（，）的自旋涨落和局域自旋磁化率。当Znis取代到Cu位上时，由于出现了以波矢Q为中心的相称反铁磁激发，与已知的非相称自旋密度波激发共存，出现了局部自旋磁化率的异常增强。我们的研究结果支持一个图片的锌诱导的反铁磁（AF）波动出现通过一个局部交错极化的Cuspins，并同时抑制Tas AF波动放缓接近Zn杂质表明高能量AF波动的继续重要性在远过掺杂的边缘超导的铜酸盐。
Spin fluctuations and the local spin susceptibility in isovalently Zn-substituted LaSrCuZnO(,) are measured via inelastic neutron-scattering techniques. As Znis substituted onto the Cu-sites, an anomalous enhancement of the local spin susceptibilityappears due to the emergence of a commensurate antiferromagnetic excitation centered at wave vectorQthat coexists with the known incommensurate spin-density wave excitations atQ. Our results support a picture of Zn-induced antiferromagnetic (AF) fluctuations appearing through a local staggered polarization of Cuspins, and the simultaneous suppression of Tas AF fluctuations are slowed in proximity to Zn impurities suggests the continued importance of high-energy AF fluctuations at the far overdoped edge of superconductivity in the cuprates.