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Origin of itinerant ferromagnetism in two-dimensional Fe3GeTe2 |
| Xi Chen(陈熙), Zheng-Zhe Lin(林正喆)†, and Li-Rong Cheng(程丽蓉) |
| 1 School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China |
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Abstract Magnetic order in two-dimensional systems was not supposed to exist at finite temperature. In recent years, the successful preparation of two-dimensional ferromagnetic materials such as CrI3, Cr2Ge2Te6, and Fe3GeTe2 opens up a new chapter in the remarkable field of two-dimensional materials. Here, we report on a theoretical analysis of the stability of ferromagnetism in Fe3GeTe2. We uncover the mechanism of holding long-range magnetic order and propose a model to estimate the Curie temperature of Fe3GeTe2. Our results reveal the essential role of magnetic anisotropy in maintaining the magnetic order of two-dimensional systems. The theoretical method used here can be generalized to future research of other magnetic two-dimensional systems.
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Received: 21 September 2020
Revised: 30 November 2020
Accepted manuscript online: 08 December 2020
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PACS:
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75.70.Ak
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(Magnetic properties of monolayers and thin films)
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75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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| Fund: Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. XJS200503) and the Post-Doctoral Research Project of Shaanxi Province, China. |
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Corresponding Authors:
†Corresponding author. E-mail: zzlin@xidian.edu.cn
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Cite this article:
Xi Chen(陈熙), Zheng-Zhe Lin(林正喆), and Li-Rong Cheng(程丽蓉) Origin of itinerant ferromagnetism in two-dimensional Fe3GeTe2 2021 Chin. Phys. B 30 047502
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