We present an interacting model for the electronic and magnetic behavior of a strained $(001)$ atomic layer of Sr${}_2$FeMoO${}_6,$ which shows room-temperature ferrimagnetism and magnetoresistance with potential spintronics application in the bulk. We find that the strong spin-orbit coupling in the molybdenum 4$d$ shell gives rise to a robust ferrimagnetic state with an emergent spin-polarized electronic structure consisting of flat bands and four massive or massless Dirac dispersions. Based on the spin-wave theory, we demonstrate that the magnetic order remains intact for a wide range of doping, leading to the possibility of exploring flat band physics, such as Wigner crystallization in electron-doped Sr${}_{2-x}$La${}_x$FeMoO${}_6.$ PhySH: Monolayer films, Ferrimagnetism, Half-metals …

中文翻译：

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双钙钛矿Sr2FeMoO6的（001）薄膜上自旋轨道耦合狄拉克电子的磁性和电子性质

我们为应变的电子和磁行为提供了一个相互作用模型 $（001）$ Sr的原子层${}_2$钼铁${}_6，$该图显示了室温亚铁磁性和磁阻，以及潜在的自旋电子学在整体中的应用。我们发现钼4中的强自旋轨道耦合$d$壳层产生了坚固的亚铁磁态，并出现了自发极化的电子结构，该结构由扁平带和四个块状或无质量的狄拉克色散组成。基于自旋波理论，我们证明了在大范围的掺杂中磁阶保持不变，从而导致了探索平坦带物理的可能性，例如电子掺杂Sr中的Wigner结晶${}_{2-X}$啦${}_X$钼铁${}_6。$ PhySH：单层膜，亚铁磁性，半金属……