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arXiv · 2109.08808

Strain Tunable Intrinsic Ferromagnetic in 2D Square CrBr$_2$

Fei Li·Yulu Ren·Wenhui Wan·Yong Liu·Yanfeng Ge
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Abstract

Two-dimensional (2D) intrinsic magnetic materials with high Curie temperature (Tc) coexisting with 100% spin-polarization are highly desirable for realizing promising spintronic devices. In the present work, the intrinsic magnetism of monolayer square CrBr2 is predicted by using first-principles calculations. The monolayer CrBr2 is an intrinsic ferromagnetic (FM) half-metal with the half-metallic gap of 1.58 eV. Monte Carlo simulations based on the Heisenberg model estimates Tc as 212 K. Furthermore, the large compressive strain makes CrBr2 undergo ferromagnetic-antiferromagnetic phase transition, when the biaxial tensile strain larger than 9.3% leads to the emergence of semiconducting electronic structures. Our results show that the intrinsic half-metal with a high Tc and controllable magnetic properties endow monolayer square CrBr2 a potential material for spintronic applications.

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Fei Li, Yulu Ren, Wenhui Wan, Yong Liu, Yanfeng Ge. 2021-09-18. Strain Tunable Intrinsic Ferromagnetic in 2D Square CrBr$_2$. https://doi.org/10.1063/5.0073663

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