Controlled vapor growth of 2D magnetic Cr_2Se_3 and its magnetic proximity effect in heterostructures |
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| Institution: | 1.School of Physics and Electronics, Hunan University, Changsha 410082, China;2.Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha 410082, China;3.Hunan Key Laboratory of Two-Dimensional Materials and State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Two-dimensional(2 D) magnetic materials have aroused tremendous interest due to the 2 D confinement of magnetism and potential applications in spintronic and valleytronic devices. However, most of the currently 2 D magnetic materials are achieved by the exfoliation from their bulks, of which the thickness and domain size are difficult to control, limiting the practical device applications. Here, we demonstrate the realization of thickness-tunable rhombohedral Cr_2Se_3 nanosheets on different substrates via the chemical vapor deposition route. The magnetic transition temperature at about 75 K is observed. Furthermore, van der Waals heterostructures consisting of Cr_2Se_3 nanosheets and monolayer WS_2 are constructed.We observe the magnetic proximity effect in the heterostructures, which manifests the manipulation of the valley polarization in monolayer WS_2. Our work contributes to the vapor growth and applications of 2 D magnetic materials. |
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| Keywords: | Cr2Se3 magnetic proximity effect heterostructures |
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