Volume 86, Number 3, May 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||18 May 2009|
Universal linear-temperature dependence of static magnetic susceptibility in iron pnictides
Department of Physics, Tsinghua University - Beijing 100084, China
2 Department of Physics, Yantai University - Yantai 264005, China
3 Department of Physics, Renmin University of China - Beijing 100872, China
4 Center for Advanced Study, Tsinghua University - Beijing 100084, China
5 Department of Physics, University of California at Berkeley - Berkeley, CA 94720, USA
6 Institute of Physics, Chinese Academy of Sciences - Beijing 100190, China
7 Institute of Theoretical Physics, Chinese Academy of Sciences - Beijing 100190, China
Corresponding author: email@example.com
Accepted: 17 April 2009
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.
PACS: 74.25.Ha – Magnetic properties / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.30.Fv – Spin-density waves
© EPLA, 2009
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