globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1715465115
论文题名:
Electrically induced 2D half-metallic antiferromagnets and spin field effect transistors
作者: Gong S.-J.; Gong C.; Sun Y.-Y.; Tong W.-Y.; Duan C.-G.; Chu J.-H.; Zhang X.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2018
卷: 115, 期:34
起始页码: 8511
结束页码: 8516
语种: 英语
英文关键词: 2D magnetism ; 2D materials ; Antiferromagnetic spintronics ; Half metallicity ; Spin field effect transistor
Scopus关键词: metal ; vanadium ; acceleration ; anisotropy ; antiferromagnet ; Article ; density ; electric conductivity ; electric field ; electromagnetism ; electron ; energy ; magnetic field ; nanotechnology ; polarization ; priority journal
英文摘要: Engineering the electronic band structure of material systems enables the unprecedented exploration of new physical properties that are absent in natural or as-synthetic materials. Half metallicity, an intriguing physical property arising from the metallic nature of electrons with singular spin polarization and insulating for oppositely polarized electrons, holds a great potential for a 100% spin-polarized current for high-efficiency spintronics. Conventionally synthesized thin films hardly sustain half metallicity inherited from their 3D counterparts. A fundamental challenge, in systems of reduced dimensions, is the almost inevitable spin-mixed edge or surface states in proximity to the Fermi level. Here, we predict electric field-induced half metallicity in bilayer A-type antiferromagnetic van der Waals crystals (i.e., intralayer ferromagnetism and interlayer antiferromagnetism), by employing density functional theory calculations on vanadium diselenide. Electric fields lift energy levels of the constituent layers in opposite directions, leading to the gradual closure of the gap of singular spin-polarized states and the opening of the gap of the others. We show that a vertical electrical field is a generic and effective way to achieve half metallicity in A-type antiferromagnetic bilayers and realize the spin field effect transistor. The electric field-induced half metallicity represents an appealing route to realize 2D half metals and opens opportunities for nanoscale highly efficient antiferromagnetic spintronics for information processing and storage. © 2018 National Academy of Sciences. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163672
Appears in Collections:气候变化与战略

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作者单位: Gong, S.-J., Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai, 200062, China, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China; Gong, C., Nanoscale Science and Engineering Center, University of California, Berkeley, CA 94720, United States, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Sun, Y.-Y., Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai, 200062, China; Tong, W.-Y., Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai, 200062, China; Duan, C.-G., Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai, 200062, China, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China; Chu, J.-H., Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai, 200062, China; Zhang, X., Nanoscale Science and Engineering Center, University of California, Berkeley, CA 94720, United States, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States

Recommended Citation:
Gong S.-J.,Gong C.,Sun Y.-Y.,et al. Electrically induced 2D half-metallic antiferromagnets and spin field effect transistors[J]. Proceedings of the National Academy of Sciences of the United States of America,2018-01-01,115(34)
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