Ni-Substituution Effec cts on the S Spin Dynamics and Supercon nductivity i in La_<1.85>Sr_<0.15>CuO_4
Ni-Substituution Effec cts on the S Spin Dynamics and Supercon nductivity i in La_<1.85>Sr_<0.15>CuO_4
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Ni取代对La_<1.85>Sr_<0.15>CuO_4中S自旋动力学和超导性的影响
DOI：
10.1103/physrevb.86.134529
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Yamada
中科院分区：
文献类型：
--
作者：
M. Matsuurra;M. Fujita;K. Yamada
为了阐明磁性Ni杂质掺杂对自旋动力学和超导电性影响的微观机制，对LaSrCuNiO进行了系统的非弹性中子散射研究。与在掺杂剂周围沉淀静态或准静态自旋相关的Zn掺杂相比，Ni掺杂显著降低了沙漏形磁分散体的向上分支的最小能量，其中观察到相称的磁峰。Ni掺杂进一步降低到零能，加宽了的分布，相应地出现了基温（K）正常态，同时也加宽了超导转变。
Systematic inelastic neutron scattering studies have been performed on LaSrCuNiOin order to elucidate the microscopic mechanism of magnetic Ni impurity doping effects on spin dynamics and superconductivity. In contrast to Zn doping, which precipitates static or quasistatic spin correlations around dopant, Ni doping remarkably reduces, the minimum energy of the upward branch of the hourglass-shaped magnetic dispersion where a commensurate magnetic peak is observed. Ni doping atfurther reducesto zero energy and broadens the distribution of, corresponding to the appearance of the normal state at base temperature (K) as well as the broadening of the superconducting transition.