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arXiv · 1902.07446

Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3

Zhaowei Zhang·Jingzhi Shang·Chongyun Jiang·Abdullah Rasmita·Weibo Gao·Ting Yu
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Abstract

Atomically thin magnets are the key element to build up spintronics based on two-dimensional materials. The surface nature of two-dimensional ferromagnet opens up opportunities to improve the device performance efficiently. Here, we report the intrinsic ferromagnetism in atomically thin monolayer CrBr3, directly probed by polarization resolved magneto-photoluminescence. The spontaneous magnetization persists in monolayer CrBr3 with a Curie temperature of 34 K. The development of magnons by the thermal excitation is in line with the spin-wave theory. We attribute the layer-number dependent hysteresis loops in thick layers to the magnetic domain structures. As a stable monolayer material in air, CrBr3 provides a convenient platform for fundamental physics and pushes the potential applications of the two-dimensional ferromagnetism.

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Zhaowei Zhang, Jingzhi Shang, Chongyun Jiang, Abdullah Rasmita, Weibo Gao, Ting Yu. 2019-02-20. Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3. https://doi.org/10.1021/acs.nanolett.9b00553

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