Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 22, Issue 42, Pages 24506-24515Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp03991h
Keywords
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Funding
- National key R&D Program of China [2018YFB0703800]
- Natural Science Fund of Shaanxi Province for distinguished Young Scholars [2019JC-10]
- Polymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars
- seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [CX2020083]
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Two-dimensional (2D) ferromagnetic (FM) semiconductors are highly desirable in next generation spintronic devices. Herein, we report an intrinsic FM semiconductor, an FeI3 monolayer which can be exfoliated from its bulk crystal owing to the small cleavage energy and the high in-plane stiffness. The FeI3 monolayer is dynamically and mechanically stable. Additionally, the FeI3 monolayer has sizable magneto-crystalline anisotropy energy (MAE) and the Curie temperature is higher than the liquid-nitrogen temperature (77 K), and there is a big discrepancy (Delta(cbm)) between the conduction band minimum of the two spin-channels and negligible thermally induced hop. Carrier doping less than 0.1 e per unit cell further improves the relevant properties by modulating the MAE, Curie temperature, and Delta(cbm). Moreover, the isoelectronic analogue FeI1.5Cl1.5 monolayer is a bipolar FM semiconductor with a high Curie temperature (260 K). Our results demonstrate promising applications of the FeI3 monolayer in next-generation spintronic devices owing to its robust intrinsic ferromagnetism and novel semiconducting properties.
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