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Universal linear-temperature dependence of static magnetic susceptibility in iron-pnictides

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arxiv 0809.3874 v3 pith:557N6ILT submitted 2008-09-23 cond-mat.str-el cond-mat.supr-con

Universal linear-temperature dependence of static magnetic susceptibility in iron-pnictides

Guang-Ming Zhang , Yue-Hua Su , Zhong-Yi Lu , Zheng-Yu Weng , Dung-Hai Lee , Tao Xiang This is my paper
classification cond-mat.str-el cond-mat.supr-con
keywords beendependenceiron-pnictideslinear-temperaturemagneticsusceptibilityuniversalantiferromagnetic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A universal linear-temperature dependence of the uniform magnetic susceptibility has been observed in the nonmagnetic normal state of iron-pnictides. This non-Pauli and non-Curie-Weiss-like paramagnetic behavior cannot be understood within a pure itinerant 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.

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