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Spin-orbital Yu-Shiba-Rusinov states in single Kondo molecular magnet

Author

Listed:
  • Hui-Nan Xia

    (Huazhong University of Science and Technology)

  • Emi Minamitani

    (Institute for Molecular Science
    Osaka University)

  • Rok Žitko

    (Jožef Stefan Institute
    University of Ljubljana)

  • Zhen-Yu Liu

    (Huazhong University of Science and Technology)

  • Xin Liao

    (Huazhong University of Science and Technology)

  • Min Cai

    (Huazhong University of Science and Technology)

  • Zi-Heng Ling

    (Huazhong University of Science and Technology)

  • Wen-Hao Zhang

    (Huazhong University of Science and Technology)

  • Svetlana Klyatskaya

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Mario Ruben

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
    Karlsruhe Institute of Technology (KIT)
    Institut de Science et d’Ingénierie Supramoléculaires (ISIS))

  • Ying-Shuang Fu

    (Huazhong University of Science and Technology
    Huazhong University of Science and Technology)

Abstract

Studies of single-spin objects are essential for designing emergent quantum states. We investigate a molecular magnet Tb2Pc3 interacting with a superconducting Pb(111) substrate, which hosts unprecedented Yu-Shiba-Rusinov (YSR) subgap states, dubbed spin-orbital YSR states. Upon adsorption of the molecule on Pb, the degeneracy of its lowest unoccupied molecular orbitals (LUMO) is lifted, and the lower LUMO forms a radical spin via charge transfer. This leads to Kondo screening and subgap states. Intriguingly, the YSR states display two pairs of resonances with clearly distinct behavior. The energy of the inner pair exhibits prominent inter and intra molecular variation, and it strongly depends on the tip height. The outer pair, however, shifts only slightly. As is unveiled through theoretical calculations, the two pairs of YSR states originate from the ligand spin and charge-fluctuating higher LUMO, coexisting in a single molecule, but only weakly coupled presumably due to different spatial distribution. Our work paves the way for understanding complex many-body excitations and constructing molecule-based topological superconductivity.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34187-8
    DOI: 10.1038/s41467-022-34187-8
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    References listed on IDEAS

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    1. Tadahiro Komeda & Hironari Isshiki & Jie Liu & Yan-Feng Zhang & Nicolás Lorente & Keiichi Katoh & Brian K. Breedlove & Masahiro Yamashita, 2011. "Observation and electric current control of a local spin in a single-molecule magnet," Nature Communications, Nature, vol. 2(1), pages 1-7, September.
    2. Deung-Jang Choi & Carmen Rubio-Verdú & Joeri de Bruijckere & Miguel M. Ugeda & Nicolás Lorente & Jose Ignacio Pascual, 2017. "Mapping the orbital structure of impurity bound states in a superconductor," Nature Communications, Nature, vol. 8(1), pages 1-6, August.
    3. 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.
    4. Jian Li & Titus Neupert & Zhijun Wang & A. H. MacDonald & A. Yazdani & B. Andrei Bernevig, 2016. "Two-dimensional chiral topological superconductivity in Shiba lattices," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
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