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Observation of a spontaneous anomalous Hall response in the Mn5Si3 d-wave altermagnet candidate

Author

Listed:
  • Helena Reichlova

    (Technische Universität Dresden
    Czech Academy of Sciences)

  • Rafael Lopes Seeger

    (Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, Spintec)

  • Rafael González-Hernández

    (Universidad del Norte
    Johannes Gutenberg Universität Mainz)

  • Ismaila Kounta

    (Aix Marseille Univ, CNRS, CINAM, AMUTECH)

  • Richard Schlitz

    (Technische Universität Dresden)

  • Dominik Kriegner

    (Technische Universität Dresden
    Czech Academy of Sciences)

  • Philipp Ritzinger

    (Technische Universität Dresden
    Czech Academy of Sciences)

  • Michaela Lammel

    (Leibniz Institute for Solid State and Materials Research (IFW Dresden)
    Universität Konstanz, Fachbereich Physik)

  • Miina Leiviskä

    (Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, Spintec)

  • Anna Birk Hellenes

    (Johannes Gutenberg Universität Mainz)

  • Kamil Olejník

    (Czech Academy of Sciences)

  • Vaclav Petřiček

    (Czech Academy of Sciences)

  • Petr Doležal

    (Charles University)

  • Lukas Horak

    (Charles University)

  • Eva Schmoranzerova

    (Charles University)

  • Antonín Badura

    (Charles University)

  • Sylvain Bertaina

    (Aix Marseille Univ, CNRS IM2NP-UMR)

  • Andy Thomas

    (Technische Universität Dresden
    Leibniz Institute for Solid State and Materials Research (IFW Dresden))

  • Vincent Baltz

    (Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, Spintec)

  • Lisa Michez

    (Aix Marseille Univ, CNRS, CINAM, AMUTECH)

  • Jairo Sinova

    (Johannes Gutenberg Universität Mainz
    Texas A&M University)

  • Sebastian T. B. Goennenwein

    (Technische Universität Dresden
    Universität Konstanz, Fachbereich Physik)

  • Tomáš Jungwirth

    (Czech Academy of Sciences
    University of Nottingham)

  • Libor Šmejkal

    (Czech Academy of Sciences
    Johannes Gutenberg Universität Mainz)

Abstract

Phases with spontaneous time-reversal ( $${{{{{{{\mathcal{T}}}}}}}}$$ T ) symmetry breaking are sought after for their anomalous physical properties, low-dissipation electronic and spin responses, and information-technology applications. Recently predicted altermagnetic phase features an unconventional and attractive combination of a strong $${{{{{{{\mathcal{T}}}}}}}}$$ T -symmetry breaking in the electronic structure and a zero or only weak-relativistic magnetization. In this work, we experimentally observe the anomalous Hall effect, a prominent representative of the $${{{{{{{\mathcal{T}}}}}}}}$$ T -symmetry breaking responses, in the absence of an external magnetic field in epitaxial thin-film Mn5Si3 with a vanishingly small net magnetic moment. By symmetry analysis and first-principles calculations we demonstrate that the unconventional d-wave altermagnetic phase is consistent with the experimental structural and magnetic characterization of the Mn5Si3 epilayers, and that the theoretical anomalous Hall conductivity generated by the phase is sizable, in agreement with experiment. An analogy with unconventional d-wave superconductivity suggests that our identification of a candidate of unconventional d-wave altermagnetism points towards a new chapter of research and applications of magnetic phases.

Suggested Citation

  • Helena Reichlova & Rafael Lopes Seeger & Rafael González-Hernández & Ismaila Kounta & Richard Schlitz & Dominik Kriegner & Philipp Ritzinger & Michaela Lammel & Miina Leiviskä & Anna Birk Hellenes & K, 2024. "Observation of a spontaneous anomalous Hall response in the Mn5Si3 d-wave altermagnet candidate," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48493-w
    DOI: 10.1038/s41467-024-48493-w
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    References listed on IDEAS

    as
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    1. Guowei Yang & Zhanghuan Li & Sai Yang & Jiyuan Li & Hao Zheng & Weifan Zhu & Ze Pan & Yifu Xu & Saizheng Cao & Wenxuan Zhao & Anupam Jana & Jiawen Zhang & Mao Ye & Yu Song & Lun-Hui Hu & Lexian Yang &, 2025. "Three-dimensional mapping of the altermagnetic spin splitting in CrSb," Nature Communications, Nature, vol. 16(1), pages 1-9, December.

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