论文标题
hund的旋转密度波态的偶联和电子各向异性
Hund's coupling and electronic anisotropy in the spin-density wave state of iron pnictides
论文作者
论文摘要
在Multiband Systems中，Hund的耦合（$ j $）在旋转和电荷激发中起着重要作用。我们研究了电子各向异性对$ j $的依赖性在沿不同方向的drude重量方面以及在四倍对称性的破碎旋转旋转密度波状态下的轨道顺序。在$ j \ sim 0.25U $ $ u $的小窗口内，drude重量各向异性的稳健行为与$ u $作为欧洲库仑内相互作用，用沿重建的费米表面沿轨道重量分布进行了描述。我们还发现，在后者的广泛接受制度中，铁轨道订单增加了，这是由于磁化增加增加而被解释的。
In the multiband systems, Hund's coupling ($J$) plays a significant role in the spin and charge excitations. We study the dependence of electronic anisotropy on $J$ in terms of Drude-weight along different directions as well as the orbital order in the four-fold symmetry broken spin-density wave state of iron pnictides. A robust behavior of the Drude-weight anisotropy within a small window around $J \sim 0.25U$ with $U$ as intraorbital Coulomb interaction is described in terms of orbital-weight distribution along the reconstructed Fermi surfaces. We also find that the ferro-orbital order increases with $J$ in the widely accepted regime for the latter, which is explained as a consequence of rising exchange field with an increase in magnetization.
