Universal linear-temperature dependence of static magnetic susceptibility in iron pnictides
Universal linear-temperature dependence of static magnetic susceptibility in iron pnictides
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DOI：
10.1209/0295-5075/86/37006
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
Guang-Ming Zhang;Yuehua Su;Zhong-yi Lu;Z. Weng;Dung-Hai Lee;T. Xiang
中科院分区：
文献类型：
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作者：
Guang-Ming Zhang;Yuehua Su;Zhong-yi Lu;Z. Weng;Dung-Hai Lee;T. Xiang
在非磁性正常态下，观察到了均匀磁化率与温度的普遍线性关系。这种非泡利和非居里-魏斯的顺磁行为不可能在简单的平均场图像中被理解。我们认为，这是由于存在一个宽的反铁磁涨落窗口，在该窗口中存在局部自旋-密度-波关联，但尚未建立全局方向有序。
A universal linear-temperature dependence of the uniform magnetic susceptibility has been observed in the non-magnetic normal state of iron pnictides. This non-Pauli and non-Curie-Weiss-like paramagnetic behavior cannot be understood within a simple mean-field picture. We argue that it results from the existence of a wide antiferromagnetic fluctuation window in which the local spin-density-wave correlations exist but the global directional order has not been established yet.