中国物理B ›› 2021, Vol. 30 ›› Issue (9): 97601-097601.doi: 10.1088/1674-1056/ac0cd9

所属专题： SPECIAL TOPIC — Two-dimensional magnetic materials and devices

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Controlled vapor growth of 2D magnetic Cr2Se3 and its magnetic proximity effect in heterostructures

Danliang Zhang(张丹亮)1,†, Chen Yi(易琛)2,†, Cuihuan Ge(葛翠环)1, Weining Shu(舒维宁)1, Bo Li(黎博)1, Xidong Duan(段曦东)3, Anlian Pan(潘安练)2,‡, and Xiao Wang(王笑)1,§   

  1. 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
  • 收稿日期:2021-04-13 修回日期:2021-05-28 接受日期:2021-06-21 出版日期:2021-08-19 发布日期:2021-08-30
  • 通讯作者: Anlian Pan, Xiao Wang E-mail:anlian.pan@hnu.edu.cn;xiao_wang@hnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52022029, 91850116, 51772084, 62090035, and U19A2090), Hunan Provincial Natural Science Foundation of China (Grant Nos. 2018RS3051 and 2018WK4004), and the Key Program of the Hunan Provincial Science and Technology Department (Grant No. 2019XK2001).

Controlled vapor growth of 2D magnetic Cr2Se3 and its magnetic proximity effect in heterostructures

Danliang Zhang(张丹亮)1,†, Chen Yi(易琛)2,†, Cuihuan Ge(葛翠环)1, Weining Shu(舒维宁)1, Bo Li(黎博)1, Xidong Duan(段曦东)3, Anlian Pan(潘安练)2,‡, and Xiao Wang(王笑)1,§   

  1. 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
  • Received:2021-04-13 Revised:2021-05-28 Accepted:2021-06-21 Online:2021-08-19 Published:2021-08-30
  • Contact: Anlian Pan, Xiao Wang E-mail:anlian.pan@hnu.edu.cn;xiao_wang@hnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52022029, 91850116, 51772084, 62090035, and U19A2090), Hunan Provincial Natural Science Foundation of China (Grant Nos. 2018RS3051 and 2018WK4004), and the Key Program of the Hunan Provincial Science and Technology Department (Grant No. 2019XK2001).

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摘要： Two-dimensional (2D) magnetic materials have aroused tremendous interest due to the 2D confinement of magnetism and potential applications in spintronic and valleytronic devices. However, most of the currently 2D 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 Cr2Se3 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 Cr2Se3 nanosheets and monolayer WS2 are constructed. We observe the magnetic proximity effect in the heterostructures, which manifests the manipulation of the valley polarization in monolayer WS2. Our work contributes to the vapor growth and applications of 2D magnetic materials.

关键词: Cr2Se3, magnetic proximity effect, heterostructures

Abstract: Two-dimensional (2D) magnetic materials have aroused tremendous interest due to the 2D confinement of magnetism and potential applications in spintronic and valleytronic devices. However, most of the currently 2D 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 Cr2Se3 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 Cr2Se3 nanosheets and monolayer WS2 are constructed. We observe the magnetic proximity effect in the heterostructures, which manifests the manipulation of the valley polarization in monolayer WS2. Our work contributes to the vapor growth and applications of 2D magnetic materials.

Key words: Cr2Se3, magnetic proximity effect, heterostructures

中图分类号:  (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)

  • 76.50.+g
75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 42.25.Ja (Polarization)