Modeling the antiferromagnetic phase in iron pnictides: weakly ordered state.
Modeling the antiferromagnetic phase in iron pnictides: weakly ordered state.
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DOI：
10.1103/physrevlett.103.247202
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发表时间：
2009-09
影响因子：
8.6
通讯作者：
E. Kaneshita;T. Morinari;T. Tohyama
中科院分区：
文献类型：
--
作者：
E. Kaneshita;T. Morinari;T. Tohyama
利用平均场方法研究了铁磷属元素化物中反铁磁相的电子态。我们发现，一个五带模型表现出一个小的磁矩，不符合第一性原理计算，再现以及激发光谱的特点是在低能量下出现的Néel温度以下的多峰结构，以及在高能量下几乎与温度无关的结构。研究了该模型的层间磁电阻，并预测了其与费米面的特征场关系。
We examine electronic states of antiferromagnetic phase in iron pnictides by mean-field calculations of the optical conductivity. We find that a five-band model exhibiting a small magnetic moment, inconsistent with the first-principles calculations, reproduces well the excitation spectra characterized by a multipeak structure emerging below the Néel temperature at low energy, together with an almost temperature-independent structure at high energy. Investigating the interlayer magnetoresistance for this model, we also predict its characteristic field dependence reflecting the Fermi surface.