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Iron phthalocyanine on Au(111) is a “non-Landau” Fermi liquid

Author

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  • R. Žitko

    (Jožef Stefan Institute
    University of Ljubljana)

  • G. G. Blesio

    (Jožef Stefan Institute
    Instituto de Física Rosario (CONICET) and Universidad Nacional de Rosario)

  • L. O. Manuel

    (Instituto de Física Rosario (CONICET) and Universidad Nacional de Rosario)

  • A. A. Aligia

    (Centro Atómico Bariloche and Instituto Balseiro)

Abstract

The paradigm of Landau’s Fermi liquid theory has been challenged with the finding of a strongly interacting Fermi liquid that cannot be adiabatically connected to a non-interacting system. A spin-1 two-channel Kondo impurity with anisotropy D has a quantum phase transition between two topologically different Fermi liquids with a peak (dip) in the Fermi level for D Dc). Extending this theory to general multi-orbital problems with finite magnetic field, we reinterpret in a unified and consistent fashion several experimental studies of iron phthalocyanine molecules on Au(111) that were previously described in disconnected and conflicting ways. The differential conductance shows a zero-bias dip that widens when the molecule is lifted from the surface (reducing the Kondo couplings) and is transformed continuously into a peak under an applied magnetic field. We reproduce all features and propose an experiment to induce the topological transition.

Suggested Citation

  • R. Žitko & G. G. Blesio & L. O. Manuel & A. A. Aligia, 2021. "Iron phthalocyanine on Au(111) is a “non-Landau” Fermi liquid," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26339-z
    DOI: 10.1038/s41467-021-26339-z
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    References listed on IDEAS

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