论文标题
平面诱导二维系统中的室温铁电磁
Flat band induced room temperature ferromagnetism in two dimensional systems
论文作者
论文摘要
二维材料的显着特性将其提升到了技术应用中最有前途的候选人的等级。特别是，在2D材料中远程铁磁顺序的可能性正在引起日益增长的兴奋。在这里，我们证明了平面带（FBS）可能为2D化合物中的室温铁磁磁性铺平了道路。实际上，局部自旋之间的磁交换在很大程度上由FB-FB贡献支配。该贡献是铁磁的，并且与局部耦合线性缩放，因此导致交叉温度（铁磁相/磁磁相）的数量级高于实验中当前报道的数量级。在微米大小的FB系统中，可以达到高达$ 600〜K $的交叉温度。
The remarkable and fascinating properties of two-dimensional materials have raised them to the rank of most promising candidates for technological applications. In particular, the possibility of long-range ferromagnetic order in 2D materials is generating a growing excitement. Here, we demonstrate that flat bands (FBs) may pave the way to room temperature ferromagnetism in 2D compounds. Indeed, the magnetic exchanges between localized spins are largely dominated by the FB-FB contribution. This contribution is ferromagnetic and scales linearly with the local coupling, thus leading to cross-over temperatures (ferromagnetic phase/ paramagnetic phase) higher by an order of magnitude than those currently reported in experiments. Cross-over temperatures as high as $600~ K$ could be reached in micrometer-sized FB systems.
