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arXiv · 2103.00339

Covalent 2D Cr$_2$Te$_3$ ferromagnet

Mengying Bian·Aleksandr N. Kamenskii·Mengjiao Han·Wenjie Li·Sichen Wei·Xuezeng Tian·David B. Eason·Fan Sun·Keke He·Haolei Hui·Fei Yao·Renat Sabirianov·Jonathan P. Bird·Chunlei Yang·Jianwei Miao·Junhao Lin·Scott A. Crooker·Yanglong Hou·Hao Zeng
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Abstract

To broaden the scope of van der Waals 2D magnets, we report the synthesis and magnetism of covalent 2D magnetic Cr$_2$Te$_3$ with a thickness down to one-unit-cell. The 2D Cr$_2$Te$_3$ crystals exhibit robust ferromagnetism with a Curie temperature of 180 K, a large perpendicular anisotropy of 7*105 J m-3, and a high coercivity of ~ 4.6 kG at 20 K. First-principles calculations further show a transition from canted to collinear ferromagnetism, a transition from perpendicular to in-plane anisotropy, and emergent half-metallic behavior in atomically-thin Cr$_2$Te$_3$, suggesting its potential application for injecting carriers with high spin polarization into spintronic devices.

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Mengying Bian, Aleksandr N. Kamenskii, Mengjiao Han, Wenjie Li, Sichen Wei, Xuezeng Tian, David B. Eason, Fan Sun, Keke He, Haolei Hui, Fei Yao, Renat Sabirianov, Jonathan P. Bird, Chunlei Yang, Jianwei Miao, Junhao Lin, Scott A. Crooker, Yanglong Hou, Hao Zeng. 2021-02-27. Covalent 2D Cr$_2$Te$_3$ ferromagnet. https://doi.org/10.1080/21663831.2020.1865469

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