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Magnetic anisotropy in Shiba bound states across a quantum phase transition

Author

Listed:
  • Nino Hatter

    (Fachbereich Physik, Freie Universität Berlin)

  • Benjamin W. Heinrich

    (Fachbereich Physik, Freie Universität Berlin)

  • Michael Ruby

    (Fachbereich Physik, Freie Universität Berlin)

  • Jose I. Pascual

    (Fachbereich Physik, Freie Universität Berlin
    CIC nanoGUNE and Ikerbasque, Basque Foundation for Science)

  • Katharina J. Franke

    (Fachbereich Physik, Freie Universität Berlin)

Abstract

The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of the paired superconducting quasiparticles. Here we use scanning tunnelling spectroscopy to identify the different quantum ground states of manganese phthalocyanine on Pb(111). We observe Shiba states, which are split into triplets by magnetocrystalline anisotropy. Their characteristic spectral weight yields an unambiguous proof of the nature of the quantum ground state. Our results provide experimental insights into the phase diagram of a magnetic impurity on a superconducting host and shine light on the effects induced by magnetic anisotropy on many-body interactions.

Suggested Citation

  • Nino Hatter & Benjamin W. Heinrich & Michael Ruby & Jose I. Pascual & Katharina J. Franke, 2015. "Magnetic anisotropy in Shiba bound states across a quantum phase transition," Nature Communications, Nature, vol. 6(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9988
    DOI: 10.1038/ncomms9988
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    Cited by:

    1. Hui-Nan Xia & Emi Minamitani & Rok Žitko & Zhen-Yu Liu & Xin Liao & Min Cai & Zi-Heng Ling & Wen-Hao Zhang & Svetlana Klyatskaya & Mario Ruben & Ying-Shuang Fu, 2022. "Spin-orbital Yu-Shiba-Rusinov states in single Kondo molecular magnet," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. M. Uldemolins & A. Mesaros & G. D. Gu & A. Palacio-Morales & M. Aprili & P. Simon & F. Massee, 2024. "Hund’s coupling mediated multi-channel quantum phase transition of a single magnetic impurity in Fe(Se, Te)," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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