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Designer spin order in diradical nanographenes

Author

Listed:
  • Yuqiang Zheng

    (Shanghai Jiao Tong University)

  • Can Li

    (Shanghai Jiao Tong University)

  • Chengyang Xu

    (Shanghai Jiao Tong University)

  • Doreen Beyer

    (Technische Universität Dresden)

  • Xinlei Yue

    (Shanghai Jiao Tong University)

  • Yan Zhao

    (Shanghai Jiao Tong University)

  • Guanyong Wang

    (Shanghai Jiao Tong University)

  • Dandan Guan

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Yaoyi Li

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Hao Zheng

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Canhua Liu

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Junzhi Liu

    (The University of Hong Kong)

  • Xiaoqun Wang

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Weidong Luo

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Xinliang Feng

    (Technische Universität Dresden)

  • Shiyong Wang

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Jinfeng Jia

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

Abstract

The magnetic properties of carbon materials are at present the focus of intense research effort in physics, chemistry and materials science due to their potential applications in spintronics and quantum computing. Although the presence of spins in open-shell nanographenes has recently been confirmed, the ability to control magnetic coupling sign has remained elusive but highly desirable. Here, we demonstrate an effective approach of engineering magnetic ground states in atomically precise open-shell bipartite/nonbipartite nanographenes using combined scanning probe techniques and mean-field Hubbard model calculations. The magnetic coupling sign between two spins was controlled via breaking bipartite lattice symmetry of nanographenes. In addition, the exchange-interaction strength between two spins has been widely tuned by finely tailoring their spin density overlap, realizing a large exchange-interaction strength of 42 meV. Our demonstrated method provides ample opportunities for designer above-room-temperature magnetic phases and functionalities in graphene nanomaterials.

Suggested Citation

  • Yuqiang Zheng & Can Li & Chengyang Xu & Doreen Beyer & Xinlei Yue & Yan Zhao & Guanyong Wang & Dandan Guan & Yaoyi Li & Hao Zheng & Canhua Liu & Junzhi Liu & Xiaoqun Wang & Weidong Luo & Xinliang Feng, 2020. "Designer spin order in diradical nanographenes," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-19834-2
    DOI: 10.1038/s41467-020-19834-2
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    Cited by:

    1. Lina Du & Bo Gao & Song Xu & Qun Xu, 2023. "Strong ferromagnetism of g-C3N4 achieved by atomic manipulation," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Qingyang Du & Xuelei Su & Yufeng Liu & Yashi Jiang & Can Li & KaKing Yan & Ricardo Ortiz & Thomas Frederiksen & Shiyong Wang & Ping Yu, 2023. "Orbital-symmetry effects on magnetic exchange in open-shell nanographenes," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Xinnan Peng & Harshitra Mahalingam & Shaoqiang Dong & Pingo Mutombo & Jie Su & Mykola Telychko & Shaotang Song & Pin Lyu & Pei Wen Ng & Jishan Wu & Pavel Jelínek & Chunyan Chi & Aleksandr Rodin & Jion, 2021. "Visualizing designer quantum states in stable macrocycle quantum corrals," Nature Communications, Nature, vol. 12(1), pages 1-9, December.

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