Large edge magnetism in oxidized few-layer black phosphorus nanomeshes |
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Authors: | Nakanishi Yudai Ishi Ayumi Ohata Chika Soriano David Iwaki Ryo Nomura Kyoko Hasegawa Miki Nakamura Taketomo Katsumoto Shingo Roche Stephan Haruyama Junji |
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Affiliation: | 1. Faculty of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan;2. Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan;3. Catalan Institute of Nanoscience and Nanotechnology(ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain;4. Institute for solid state physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;5. Catalan Institute of Nanoscience and Nanotechnology(ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain;Institució Catalana de Recercai Estudis Avan(c)ats(ICREA), 08010 Barcelona, Spain |
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Abstract: | The formation and control of a room-temperature magnetic order in twodimensional (2D) materials is a challenging quest for the advent of innovative magnetic-and spintronic-based technologies.To date,edge magnetism in 2D materials has been experimentally observed in hydrogen (H)-terminated graphene nanoribbons (GNRs) and graphene nanomeshes (GNMs),but the measured magnetization remains far too small to allow envisioning practical applications.Herein,we report experimental evidences of large room-temperature edge ferromagnetism (FM) obtained from oxygen (O)-terminated zigzag pore edges of few-layer black phosphorus (P) nanomeshes (BPNMs).The magnetization values per unit area are ~100 times larger than those reported for H-terminated GNMs,while the magnetism is absent for H-terminated BPNMs.The magnetization measurements and the first-principles simulations suggest that the origin of such a magnetic order could stem from ferromagnetic spin coupling between edge P with O atoms,resulting in a strong spin localization at the edge valence band,and from uniform oxidation of full pore edges over a large area and interlayer spin interaction.Our findings pave the way for realizing high-efficiency 2D flexible magnetic and spintronic devices without the use of rare magnetic elements. |
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Keywords: | black phosphorus nanomesh edge magnetism spintronics zigzag edge oxygen termination rare-metal free |
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