Large edge magnetism in oxidized few-layer black phosphorus nanomeshes

Yudai Nakanishi, Ayumi Ishi, Chika Ohata, David Soriano, Ryo Iwaki, Kyoko Nomura, Miki Hasegawa, Taketomo Nakamura, Shingo Katsumoto, Stephan Roche, Junji Haruyama

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    16 Citations (Scopus)

    Abstract

    © 2017, Tsinghua University Press and Springer-Verlag Berlin Heidelberg. 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. [Figure not available: see fulltext.]
    Original languageEnglish
    Pages (from-to)718-728
    JournalNano Research
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2017

    Keywords

    • black phosphorus nanomesh
    • edge magnetism
    • oxygen termination
    • rare-metal free
    • spintronics
    • zigzag edge

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  • Cite this

    Nakanishi, Y., Ishi, A., Ohata, C., Soriano, D., Iwaki, R., Nomura, K., Hasegawa, M., Nakamura, T., Katsumoto, S., Roche, S., & Haruyama, J. (2017). Large edge magnetism in oxidized few-layer black phosphorus nanomeshes. Nano Research, 10(2), 718-728. https://doi.org/10.1007/s12274-016-1355-8