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Single-molecule quantum dot as a Kondo simulator

Author

Listed:
  • R. Hiraoka

    (The University of Tokyo)

  • E. Minamitani

    (The University of Tokyo)

  • R. Arafune

    (International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science)

  • N. Tsukahara

    (The University of Tokyo)

  • S. Watanabe

    (The University of Tokyo)

  • M. Kawai

    (The University of Tokyo)

  • N. Takagi

    (The University of Tokyo)

Abstract

Structural flexibility of molecule-based systems is key to realizing the novel functionalities. Tuning the structure in the atomic scale enables us to manipulate the quantum state in the molecule-based system. Here we present the reversible Hamiltonian manipulation in a single-molecule quantum dot consisting of an iron phthalocyanine molecule attached to an Au electrode and a scanning tunnelling microscope tip. We precisely controlled the position of Fe2+ ion in the molecular cage by using the tip, and tuned the Kondo coupling between the molecular spins and the Au electrode. Then, we realized the crossover between the strong-coupling Kondo regime and the weak-coupling regime governed by spin–orbit interaction in the molecule. The results open an avenue to simulate low-energy quantum many-body physics and quantum phase transition through the molecular flexibility.

Suggested Citation

  • R. Hiraoka & E. Minamitani & R. Arafune & N. Tsukahara & S. Watanabe & M. Kawai & N. Takagi, 2017. "Single-molecule quantum dot as a Kondo simulator," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms16012
    DOI: 10.1038/ncomms16012
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    Cited by:

    1. 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.

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