论文标题
MNPS $ _3 $中的大型激子绑定能作为VDW分层磁铁的案例研究
Large exciton binding energies in MnPS$_3$ as a case study of vdW layered magnet
论文作者
论文摘要
半导体单层中的稳定激子，例如过渡金属二盐元素（TMDC），可以激励和激励基础研究以及室温光电电子应用的开发。新发现的分层磁性材料为将光学功能与磁性整合在一起提供了独特的机会。我们预测，MPX $ _3 $ family family的大量抗磁性半导体单层展示了巨大的激发型结合能，使其成为适合磁光光学研究和光融合应用的平台。实际上，我们的研究基于第一原理方法与有效模型的伯特盐溶解器相结合，表明裸露的neel-mnps $ _3 $中的激子受到超过1 eV的限制，这是TMDC中激素能量的两倍。另外，可以使用不同的光的极化来间接推断单层样品的抗铁磁有序。
Stable excitons in semiconductor monolayers such as transition-metal dichalcogenides (TMDCs) enable and motivate fundamental research as well as the development of room-temperature optoelectronics applications. The newly discovered layered magnetic materials present a unique opportunity to integrate optical functionalities with magnetism. We predict that a large class of antiferromagnetic semiconducting monolayers of the MPX$_3$ family exhibit giant excitonic binding energies, making them suitable platforms for magneto-optical investigations and optospintronics applications. Indeed, our investigations, based on first principles methods combined with an effective-model Bethe-Salpeter solver, show that excitons in bare Neel-MnPS$_3$ are bound by more than 1 eV, which is twice the excitonic energies in TMDCs. In addition, the antiferromagnetic ordering of monolayer samples can be inferred indirectly using different polarization of light.
