Neutron scattering study on electron–hole doping symmetry of high-Tc superconductivity
Neutron scattering study on electron–hole doping symmetry of high-Tc superconductivity
复制标题
高温超导电子空穴掺杂对称性的中子散射研究
DOI：
10.1016/s0022-3697(99)00042-6
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发表时间：
1999
影响因子：
4
通讯作者：
G. Shirane
中科院分区：
文献类型：
--
作者：
K. Yamada;K. Kurahashi;Y. Endoh;R. Birgeneau;G. Shirane
我们回顾了空穴掺杂 La2−xSrxCuO4+y 和电子掺杂 Nd1.85Ce0.15CuO4+y 超导体自旋相关性中子散射实验的最新结果。对于前者，空穴掺杂会引起沿 Cu-O 键的不相称的自旋密度调制。对于后者，我们首次观察到超导相（Tc≈18K）中明确的自旋涨落。与空穴掺杂相反，电子掺杂不会引起明确的不相称自旋调制；磁信号出现在 (π, π) 处，其 q 宽度比生长的反铁磁相宽。对于这两个系统，在超导状态下都观察到静磁序。
We review recent results of neutron scattering experiment on spin correlations for both hole-doped La2−xSrxCuO4+yand electron-doped Nd1.85Ce0.15CuO4+ysuperconductors. For the former, hole-doping induces an incommensurate spin density modulation along the Cu–O bonds. For the latter, we observed well-defined spin fluctuations in the superconducting phase (Tc≈18K) for the first time. In contrast to the hole-doping, the electron-doping induces no well-defined incommensurate spin modulation; the magnetic signal appears at (π, π) with a q-width broader than in the as-grown antiferromagnetic phase. For both systems a static magnetic order was observed in the superconducting state.