中国物理B ›› 2021, Vol. 30 ›› Issue (9): 97507-097507.doi: 10.1088/1674-1056/ac0cd1

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

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Strain drived band aligment transition of the ferromagnetic VS2/C3N van der Waals heterostructure

Jimin Shang(商继敏)1, Shuai Qiao(乔帅)1, Jingzhi Fang(房景治)2, Hongyu Wen(文宏玉)2,†, and Zhongming Wei(魏钟鸣)2   

  1. 1 School of Physics and Electronics Engineering, Zhengzhou University of Light Industry&Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
    2 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences&Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2021-04-25 修回日期:2021-06-17 接受日期:2021-06-21 出版日期:2021-08-19 发布日期:2021-08-31
  • 通讯作者: Hongyu Wen E-mail:wenhongyu@semi.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0207500), Natural Science Foundation of Henan Province, China (Grant No. 202300410507), and Key Research & Development and Promotion Projects in Henan Province, China (Grant No. 212102210134).

Strain drived band aligment transition of the ferromagnetic VS2/C3N van der Waals heterostructure

Jimin Shang(商继敏)1, Shuai Qiao(乔帅)1, Jingzhi Fang(房景治)2, Hongyu Wen(文宏玉)2,†, and Zhongming Wei(魏钟鸣)2   

  1. 1 School of Physics and Electronics Engineering, Zhengzhou University of Light Industry&Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
    2 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences&Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100083, China
  • Received:2021-04-25 Revised:2021-06-17 Accepted:2021-06-21 Online:2021-08-19 Published:2021-08-31
  • Contact: Hongyu Wen E-mail:wenhongyu@semi.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0207500), Natural Science Foundation of Henan Province, China (Grant No. 202300410507), and Key Research & Development and Promotion Projects in Henan Province, China (Grant No. 212102210134).

摘要: Exploring two-dimensional (2D) magnetic heterostructures is essential for future spintronic and optoelectronic devices. Herein, using first-principle calculations, stable ferromagnetic ordering and colorful electronic properties are established by constructing the VS2/C3N van der Waals (vdW) heterostructure. Unlike the semiconductive properties with indirect band gaps in both the VS2 and C3N monolayers, our results indicate that a direct band gap with type-Ⅱ band alignment and p-doping characters are realized in the spin-up channel of the VS2/C3N heterostructure, and a typical type-Ⅲ band alignment with a broken-gap in the spin-down channel. Furthermore, the band alignments in the two spin channels can be effectively tuned by applying tensile strain. An interchangement between the type-Ⅱ and type-Ⅲ band alignments occurs in the two spin channels, as the tensile strain increases to 4%. The attractive magnetic properties and the unique band alignments could be useful for prospective applications in the next-generation tunneling devices and spintronic devices.

关键词: two-dimensional ferromagnetic material, van der Waals heterostructure, band alignment, strain

Abstract: Exploring two-dimensional (2D) magnetic heterostructures is essential for future spintronic and optoelectronic devices. Herein, using first-principle calculations, stable ferromagnetic ordering and colorful electronic properties are established by constructing the VS2/C3N van der Waals (vdW) heterostructure. Unlike the semiconductive properties with indirect band gaps in both the VS2 and C3N monolayers, our results indicate that a direct band gap with type-Ⅱ band alignment and p-doping characters are realized in the spin-up channel of the VS2/C3N heterostructure, and a typical type-Ⅲ band alignment with a broken-gap in the spin-down channel. Furthermore, the band alignments in the two spin channels can be effectively tuned by applying tensile strain. An interchangement between the type-Ⅱ and type-Ⅲ band alignments occurs in the two spin channels, as the tensile strain increases to 4%. The attractive magnetic properties and the unique band alignments could be useful for prospective applications in the next-generation tunneling devices and spintronic devices.

Key words: two-dimensional ferromagnetic material, van der Waals heterostructure, band alignment, strain

中图分类号:  (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

  • 75.70.Cn
61.82.Fk (Semiconductors)