A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe2

doi:10.1088/1674-1056/ac9b37

中国物理B ›› 2023, Vol. 32 ›› Issue (2): 27201-027201.doi: 10.1088/1674-1056/ac9b37

A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe₂

Qidi Ren(任启迪), Kang Lai(赖康), Jiahao Chen(陈家浩), Xiaoxiang Yu(余晓翔)^†, and Jiayu Dai(戴佳钰)^‡

Department of Physics, National University of Defense Technology, Changsha 410073, China

收稿日期:2022-08-24 修回日期:2022-10-08 接受日期:2022-10-19 出版日期:2023-01-10 发布日期:2023-01-31
通讯作者: Xiaoxiang Yu, Jiayu Dai E-mail:xxyu@nudt.edu.cn;jydai@nudt.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0403200), the National Natural Science Foundation of China (Grant No. 11774429), the NSAF (Grant No. U1830206), and the Science and Technology Innovation Program of Hunan Province, China (Grant No. 2021RC4026).

A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe₂

Qidi Ren(任启迪), Kang Lai(赖康), Jiahao Chen(陈家浩), Xiaoxiang Yu(余晓翔)^†, and Jiayu Dai(戴佳钰)^‡

Department of Physics, National University of Defense Technology, Changsha 410073, China

Received:2022-08-24 Revised:2022-10-08 Accepted:2022-10-19 Online:2023-01-10 Published:2023-01-31
Contact: Xiaoxiang Yu, Jiayu Dai E-mail:xxyu@nudt.edu.cn;jydai@nudt.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0403200), the National Natural Science Foundation of China (Grant No. 11774429), the NSAF (Grant No. U1830206), and the Science and Technology Innovation Program of Hunan Province, China (Grant No. 2021RC4026).

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摘要/Abstract

摘要： Exploring the novel structural phase of van der Waals (vdW) magnets would promote the development of spintronics. Here, through first-principles calculations, we report a novel monoclinic structure of vdW layered 1T-CrTe₂, which is one of the popular vdW magnets normally exhibiting a trigonal structure. The new monoclinic phase emerges from a switchable magnetic state between ferromagnetism and antiferromagnetism through changing hole doping concentration, which suggests a practical approach to obtain such a structure. The results of phonon dispersion and energy analysis convince us that the monoclinic structure is a metastable phase even without hole doping. When the hole doping concentration increases, the stability analysis indicates the preference for a novel monoclinic phase rather than a conventional trigonal phase, and meanwhile, the magnetic properties are accordingly tuned. This work provides new insights into the phase engineering of the chalcogenide family and the electrical control of magnetism of vdW layered magnets.

关键词: van der Waals magnets, magnetic transition, hole doping

Abstract: Exploring the novel structural phase of van der Waals (vdW) magnets would promote the development of spintronics. Here, through first-principles calculations, we report a novel monoclinic structure of vdW layered 1T-CrTe₂, which is one of the popular vdW magnets normally exhibiting a trigonal structure. The new monoclinic phase emerges from a switchable magnetic state between ferromagnetism and antiferromagnetism through changing hole doping concentration, which suggests a practical approach to obtain such a structure. The results of phonon dispersion and energy analysis convince us that the monoclinic structure is a metastable phase even without hole doping. When the hole doping concentration increases, the stability analysis indicates the preference for a novel monoclinic phase rather than a conventional trigonal phase, and meanwhile, the magnetic properties are accordingly tuned. This work provides new insights into the phase engineering of the chalcogenide family and the electrical control of magnetism of vdW layered magnets.

Key words: van der Waals magnets, magnetic transition, hole doping

中图分类号: (Transition-metal compounds)

72.80.Ga

75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

Qidi Ren(任启迪), Kang Lai(赖康), Jiahao Chen(陈家浩), Xiaoxiang Yu(余晓翔), and Jiayu Dai(戴佳钰). A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe₂[J]. 中国物理B, 2023, 32(2): 27201-027201.

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A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe₂

A novel monoclinic phase and electrically tunable magnetism of van der Waals layered magnet CrTe₂

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