论文标题
单层抗铁磁性的旋转映射和单层CRTE中的自旋流动过渡$ _2 $
Spin mapping of intralayer antiferromagnetism and spin-flop transition in monolayer CrTe$_2$
论文作者
论文摘要
范德华（VDW）单层（ML）晶体中的固有抗铁磁性丰富了人们对二维（2D）磁性的理解，并具有有关自旋应用中铁磁性的特殊优点。然而，由于缺乏净磁化，对内在的抗铁磁性的研究很少。在这项研究中，通过结合自旋扫描隧道显微镜和第一原理计算，我们研究了VDW ML CRTE2的磁性，该vdw ML CRTE2已成功地通过分子束的外观截图成功地生长。令人惊讶的是，我们在ML晶体的原子量表上观察到稳定的抗铁磁（AFM）顺序，该晶体的体积是强的铁磁铁，并将其成像的曲折自旋质地与原子晶格结构相关联。 AFM顺序在磁场下表现出有趣的非连线自旋流动过渡，与其计算出的中等磁各向异性一致。这项研究的结果证明了2D VDW磁性材料的复杂性，并为其深入研究铺平了道路。
Intrinsic antiferromagnetism in van der Waals (vdW) monolayer (ML) crystals enriches the understanding regarding two-dimensional (2D) magnetic orders and holds special virtues over ferromagnetism in spintronic applications. However, the studies on intrinsic antiferromagnetism are sparse, owing to the lack of net magnetisation. In this study, by combining spin-polarised scanning tunnelling microscopy and first-principles calculations, we investigate the magnetism of vdW ML CrTe2, which has been successfully grown through molecular beam epitaxy. Surprisingly, we observe a stable antiferromagnetic (AFM) order at the atomic scale in the ML crystal, whose bulk is a strong ferromagnet, and correlate its imaged zigzag spin texture with the atomic lattice structure. The AFM order exhibits an intriguing noncollinear spin-flop transition under magnetic fields, consistent with its calculated moderate magnetic anisotropy. The findings of this study demonstrate the intricacy of 2D vdW magnetic materials and pave the way for their in-depth studies.
