Universal linear-temperature dependence of static magnetic susceptibility in iron pnictides
2009; Institute of Physics; Volume: 86; Issue: 3 Linguagem: Inglês
10.1209/0295-5075/86/37006
ISSN1286-4854
AutoresG. M. Zhang, Yuehua Su, Zhong-Yi Lu, Zheng-Yu Weng, D. H. Lee, Tao Xiang,
Tópico(s)Physics of Superconductivity and Magnetism
ResumoA 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.
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