论文标题
双层kagome金属中磁性和拓扑超导的相互作用
Interplay of Magnetism and Topological Superconductivity in Bilayer Kagome Metals
论文作者
论文摘要
二进制的金属材料，$ m_3 $ sn $ _2 $（$ m $ = 3D过渡金属）呈现一类新的紧密相关系统，自然可以实现磁性和金属性的相互作用。使用第一原理计算，我们确认大量Fe $ _3 $ sn $ _2 $是铁磁金属，并表明$ m $ = ni和cu是具有非平凡带结构的顺磁金属。我们的ab-Initio结果专注于实验相关的原子薄单kagome-bilayer，以了解增强相关性的效果，我们的Ab-Initio结果表明，尺寸限制自然会暴露于与双层kagome几何相关的频带结构的平坦性，而型kagome segome kagome segome the chagome beagome neperry in the bilayer kagome sepentry y the chogomage chernetic fertrant ferromagnetic Metal in。我们使用磁带的多阶段最小建模逐渐接近费米能。这有效地捕获了Chern金属的物理学，具有非零的异常霍尔响应在相关的参数方面，以及旋转型带的可能的超导不稳定，从而产生拓扑超导体。
The binary intermetallic materials, $M_3$Sn$_2$ ($M$ = 3d transition metal) present a new class of strongly correlated systems that naturally allows for the interplay of magnetism and metallicity. Using first principles calculations we confirm that bulk Fe$_3$Sn$_2$ is a ferromagnetic metal, and show that $M$ = Ni and Cu are paramagnetic metals with non-trivial band structures. Focusing on Fe$_3$Sn$_2$ to understand the effect of enhanced correlations in an experimentally relevant atomistically thin single kagome-bilayer, our ab-initio results show that dimensional confinement naturally exposes the flatness of band structure associated with the bilayer kagome geometry in a resultant ferromagnetic Chern metal. We use a multistage minimal modeling of the magnetic bands progressively closer to the Fermi energy. This effectively captures the physics of the Chern metal with a non-zero anomalous Hall response over a material relevant parameter regime along with a possible superconducting instability of the spin-polarised band resulting in a topological superconductor.
