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Ferromagnetic quasi-atomic electrons in two-dimensional electride

Author

Listed:
  • Seung Yong Lee

    (Sungkyunkwan University
    Institute for Basic Science)

  • Jae-Yeol Hwang

    (Sungkyunkwan University
    Pukyong National University)

  • Jongho Park

    (Sungkyunkwan University
    Institute for Basic Science)

  • Chandani N. Nandadasa

    (Mississippi State University)

  • Younghak Kim

    (Pohang University of Science and Technology)

  • Joonho Bang

    (Sungkyunkwan University)

  • Kimoon Lee

    (Kunsan National University)

  • Kyu Hyoung Lee

    (Yonsei University)

  • Yunwei Zhang

    (Jilin University)

  • Yanming Ma

    (Jilin University)

  • Hideo Hosono

    (Tokyo Institute of Technology)

  • Young Hee Lee

    (Institute for Basic Science)

  • Seong-Gon Kim

    (Mississippi State University)

  • Sung Wng Kim

    (Sungkyunkwan University
    Institute for Basic Science)

Abstract

An electride, a generalized form of cavity-trapped interstitial anionic electrons (IAEs) in a positively charged lattice framework, shows exotic properties according to the size and geometry of the cavities. Here, we report that the IAEs in layer structured [Gd2C]2+·2e− electride behave as ferromagnetic elements in two-dimensional interlayer space and possess their own magnetic moments of ~0.52 μB per quasi-atomic IAE, which facilitate the exchange interactions between interlayer gadolinium atoms across IAEs, inducing the ferromagnetism in [Gd2C]2+·2e− electride. The substitution of paramagnetic chlorine atoms for IAEs proves the magnetic nature of quasi-atomic IAEs through a transition from ferromagnetic [Gd2C]2+·2e− to antiferromagnetic Gd2CCl caused by attenuating interatomic exchange interactions, consistent with theoretical calculations. These results confirm that quasi-atomic IAEs act as ferromagnetic elements and trigger ferromagnetic spin alignments within the antiferromagnetic [Gd2C]2+ lattice framework. These results present a broad opportunity to tailor intriguing ferromagnetism originating from quasi-atomic interstitial electrons in low-dimensional materials.

Suggested Citation

  • Seung Yong Lee & Jae-Yeol Hwang & Jongho Park & Chandani N. Nandadasa & Younghak Kim & Joonho Bang & Kimoon Lee & Kyu Hyoung Lee & Yunwei Zhang & Yanming Ma & Hideo Hosono & Young Hee Lee & Seong-Gon , 2020. "Ferromagnetic quasi-atomic electrons in two-dimensional electride," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15253-5
    DOI: 10.1038/s41467-020-15253-5
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    Cited by:

    1. Chan-young Lim & Min-Seok Kim & Dong Cheol Lim & Sunghun Kim & Yeonghoon Lee & Jaehoon Cha & Gyubin Lee & Sang Yong Song & Dinesh Thapa & Jonathan D. Denlinger & Seong-Gon Kim & Sung Wng Kim & Jungpil, 2024. "Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Seung Yong Lee & Dong Cheol Lim & Md Salman Khan & Jeong Yun Hwang & Hyung Sub Kim & Kyu Hyung Lee & Sung Wng Kim, 2023. "Magnetic quasi-atomic electrons driven reversible structural and magnetic transitions between electride and its hydrides," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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