Determining the phase diagram of atomically thin layered antiferromagnet CrCl3.,Nature Nanotechnology

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Determining the phase diagram of atomically thin layered antiferromagnet CrCl3.
Nature Nanotechnology ( IF 38.1 ) Pub Date : 2019-11-11 , DOI: 10.1038/s41565-019-0565-0
Zhe Wang _{1,

2,

3} , Marco Gibertini _{1,

4} , Dumitru Dumcenco ₁ , Takashi Taniguchi ₅ , Kenji Watanabe ₅ , Enrico Giannini ₁ , Alberto F Morpurgo _{1,

2}

Affiliation

Changes in the spin configuration of atomically thin, magnetic van der Waals multilayers can cause drastic modifications in their opto-electronic properties. Conversely, the opto-electronic response of these systems provides information about the magnetic state, which is very difficult to obtain otherwise. Here, we show that in CrCl3 multilayers, the dependence of the tunnelling conductance on applied magnetic field, temperature and number of layers tracks the evolution of the magnetic state, enabling the magnetic phase diagram to be determined experimentally. Besides a high-field spin-flip transition occurring for all thicknesses, the in-plane magnetoconductance exhibits an even-odd effect due to a low-field spin-flop transition. Through a quantitative analysis of the phenomena, we determine the interlayer exchange coupling as well as the layer magnetization and show that in CrCl3 shape anisotropy dominates. Our results reveal the rich behaviour of atomically thin layered antiferromagnets with weak magnetic anisotropy.

中文翻译：

确定原子薄层反铁磁体CrCl3的相图。

原子薄的磁性范德华多层膜的自旋构型变化会导致其光电性能发生急剧变化。相反，这些系统的光电响应提供了有关磁态的信息，否则很难获得这些信息。在此，我们表明，在CrCl3多层膜中，隧穿电导对所施加磁场，温度和层数的依赖性可跟踪磁态的演变，从而可以通过实验确定磁相图。除了在所有厚度上都发生高场自旋翻转跃迁外，由于低场自旋跃迁跃迁，面内磁导还表现出奇偶效应。通过对现象的定量分析，我们确定层间交换耦合以及层磁化强度，并表明在CrCl3形状中，各向异性占主导地位。我们的结果揭示了具有弱磁各向异性的原子薄层反铁磁体的丰富行为。

更新日期：2019-11-13

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