Charge and spin dynamics in antiferromagnetic metallic phase of iron-based superconductors
Charge and spin dynamics in antiferromagnetic metallic phase of iron-based superconductors
复制标题
铁基超导体反铁磁金属相的电荷和自旋动力学
DOI：
10.1016/j.jpcs.2010.10.056
复制
发表时间：
2011
影响因子：
4
通讯作者：
T.Morinari
中科院分区：
文献类型：
--
作者：
T.Tohyama;E.Kaneshita;T.Morinari
用平均场方法研究了五带Hubbard模型下铁砷化超导体反铁磁金属相的电子态、电荷动力学和自旋动力学。考虑到LaFeAsO（1111系统）和BaFe_2As_2（122系统）磁矩的差异，我们研究了磁矩大小对能带色散、光学电导率和动态自旋磁化率的影响.我们澄清了这些量的大小的影响，并预测在反铁磁金属相的1111和122系统之间的不同行为。
The electronic states, charge dynamics, and spin dynamics in the antiferromagnetic metallic phase of iron-arsenide superconductors are investigated by mean-field calculations for a five-band Hubbard model. Taking into account the difference of observed magnetic moments between LaFeAsO (1111 system) and BaFe2As2(122 system), we investigate the effect of the magnitude of the moments on band dispersion, optical conductivity, and dynamical spin susceptibility. We clarify how the magnitude affects on these quantities and predict different behaviors between the 1111 and 122 systems in the antiferromagnetic metallic phase.