Large edge magnetism in oxidized few-layer black phosphorus nanomeshes
Nakanishi, Yudai (Aoyama Gakuin Daigaku)
Ishi, Ayumi (Aoyama Gakuin Daigaku)
Ohata, Chika (Aoyama Gakuin Daigaku)
Soriano, David (Institut Català de Nanociència i Nanotecnologia)
Iwaki, Ryo (Aoyama Gakuin Daigaku.)
Nomura, Kyoto (Aoyama Gakuin Daigaku)
Hasegawa, Miki (Aoyama Gakuin Daigaku.)
Nakamura, Taketomo (Tōkyō Daigaku)
Katsumoto, Shingo (Tōkyō Daigaku)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Haruyama, Junji (Aoyama Gakuin Daigaku.)

Data:	2017
Resum:	The formation and control of a room-temperature magnetic order in two-dimensional (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.
Ajuts:	European Commission 604391 Ministerio de Economía y Competitividad FIS2015-67767-P Ministerio de Economía y Competitividad SEV-2013-0295
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Black phosphorus nanomesh ; Edge magnetism ; Oxygen termination ; Rare-metal free ; Spintronics ; Zigzag edge
Publicat a:	Nano research, Vol. 10, no. 2 (Feb. 2017) , p. 718-728, ISSN 1998-0000

DOI: 10.1007/s12274-016-1355-8

Post-print 10 p, 1.5 MB

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