Static Charge and Spin Inhomogeneity in La2 − xSrxCuO4 by NMR
Static Charge and Spin Inhomogeneity in La2 − xSrxCuO4 by NMR
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通过 NMR 测定 La2 − xSrxCuO4 中的静电荷和自旋不均匀性
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
C. Milling
中科院分区：
文献类型：
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作者：
J. Haase;C. Slichter;C. Milling
La2-xSrxCuO4 的 NMR 实验表明，表征了该材料中静态空间不均匀性的性质。发现大幅度的电荷密度变化与自旋密度变化相关。虽然电荷变化的幅度与温度无关，但随着温度变化，自旋变化呈居里式增加，并转向局部反铁磁性直至最佳掺杂。当 x = 0.2 时，相关性与温度无关，并且与中子散射中发现的局部不可通约性一致。讨论了与可能场景的关系。
NMR experiments on La2 − xSrxCuO4 are shown that characterize the nature of static spatial inhomogeneities in this material. Large amplitude charge density variations are found that are correlated with spin density variations. While the amplitude of the charge variation is temperature-independent, the spin variation increases Curie-like as the temperature varies and shifts toward local antiferromagnetism up to optimal doping. For x = 0.2 the correlation is independent on temperature and agrees with local incommensurability found in neutron scattering. Relations to possible scenarios are discussed.