论文标题
$ C_4 $ - 符号对称磁性序列的准经典理论无序的多型金属
Quasiclassical theory of $C_4$-symmetric magnetic order in disordered multiband metals
论文作者
论文摘要
在基于铁的超导体的正常状态进行的最新实验研究发现，存在$ C_4 $ -SMMETRIC（TETRAGONAL）巡回磁态的存在。该状态可以描述为具有两个不同的磁性向量$ {\ vec q} _1 $和$ {\ vec q} _2 $的旋转密度波。鉴于铁 - 刺激物中磁性的巡回特性，我们在带有各向异性条带结构的无序三频金属中开发了四方磁序的准经典理论。在我们的模型中，我们发现$ C_4 $ -SMMETRIC磁性与单个$ {\ vec Q} $磁性结构向量的$ C_2 $ -SMMETRIC状态竞争。我们的主要结果是，疾病促进四方磁态，这与早期的理论研究一致。
Recent experimental studies performed in the normal state of iron-based superconductors have discovered the existence of the $C_4$-symmetric (tetragonal) itinerant magnetic state. This state can be described as a spin density wave with two distinct magnetic vectors ${\vec Q}_1$ and ${\vec Q}_2$. Given an itinerant nature of magnetism in iron-pnictides, we develop a quasiclassical theory of tetragonal magnetic order in disordered three-band metal with anisotropic band structure. Within our model we find that the $C_4$-symmetric magnetism competes with the $C_2$-symmetric state with a single ${\vec Q}$ magnetic structure vector. Our main results is that disorder promotes tetragonal magnetic state which is in agreement with earlier theoretical studies.
