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arXiv · 2401.02693

Interlayer magnetic interactions and ferroelectricity in $\pi$/3-twisted CrX$_2$ (X = Se, Te) bilayers

Wenqi Yang·Xinlong Yang·Menglei Li·Lin Hu·Fawei Zheng
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Abstract

Recently, two-dimensional (2D) bilayer magnetic systems have been widely studied. Their interlayer magnetic interactions play a vital role in the magnetic properties. In this paper, we theoretically studied the interlayer magnetic interactions, magnetic states and ferroelectricity of $\pi$/3-twisted CrX$_2$ (X = Se, Te) bilayers ($\pi$/3-CrX$_2$). Our study reveals that the lateral shift could switch the magnetic state of the $\pi$/3-CrSe$_2$ between interlayer ferromagnetic and antiferromagnetic, while just tuning the strength of the interlayer antiferromagnetic interactions in $\pi$/3-CrTe$_2$. Furthermore, the lateral shift can alter the off-plane electric polarization in both $\pi$/3-CrSe$_2$ and $\pi$/3-CrTe$_2$. These results show that stacking is an effective way to tune both the magnetic and ferroelectric properties of 1T-CrX$_2$ bilayers, making the 1T-CrX$_2$ bilayers hold promise for 2D spintronic devices.

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Wenqi Yang, Xinlong Yang, Menglei Li, Lin Hu, Fawei Zheng. 2024-01-05. Interlayer magnetic interactions and ferroelectricity in $\pi$/3-twisted CrX$_2$ (X = Se, Te) bilayers. https://doi.org/10.1063/5.0185238

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