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Exchange-induced spin polarization in a single magnetic molecule junction

Author

Listed:
  • Tian Pei

    (University of Oxford)

  • James O. Thomas

    (University of Oxford
    University of Oxford, Chemistry Research Laboratory)

  • Simen Sopp

    (University of Oxford)

  • Ming-Yee Tsang

    (University of Oxford)

  • Nicola Dotti

    (University of Oxford)

  • Jonathan Baugh

    (University of Waterloo)

  • Nicholas F. Chilton

    (University of Manchester)

  • Salvador Cardona-Serra

    (Universidad de València)

  • Alejandro Gaita-Ariño

    (Universidad de València)

  • Harry L. Anderson

    (University of Oxford, Chemistry Research Laboratory)

  • Lapo Bogani

    (University of Oxford)

Abstract

Many spintronic devices rely on the presence of spin-polarized currents at zero magnetic field. This is often obtained by spin exchange-bias, where an element with long-range magnetic order creates magnetized states and displaces the hysteresis loop. Here we demonstrate that exchange-split spin states are observable and usable in the smallest conceivable unit: a single magnetic molecule. We use a redox-active porphyrin as a transport channel, coordinating a dysprosium-based single-molecule-magnet inside a graphene nano-gap. Single-molecule transport in magnetic field reveals the existence of exchange-split channels with different spin-polarizations that depend strongly on the field orientation, and comparison with the diamagnetic isostructural compound and milikelvin torque magnetometry unravels the role of the single-molecule anisotropy and the molecular orientation. These results open a path to using spin-exchange in molecular electronics, and offer a method to quantify the internal spin structure of single molecules in multiple oxidation states.

Suggested Citation

  • Tian Pei & James O. Thomas & Simen Sopp & Ming-Yee Tsang & Nicola Dotti & Jonathan Baugh & Nicholas F. Chilton & Salvador Cardona-Serra & Alejandro Gaita-Ariño & Harry L. Anderson & Lapo Bogani, 2022. "Exchange-induced spin polarization in a single magnetic molecule junction," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31909-w
    DOI: 10.1038/s41467-022-31909-w
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    References listed on IDEAS

    as
    1. Jiwoong Park & Abhay N. Pasupathy & Jonas I. Goldsmith & Connie Chang & Yuval Yaish & Jason R. Petta & Marie Rinkoski & James P. Sethna & Héctor D. Abruña & Paul L. McEuen & Daniel C. Ralph, 2002. "Coulomb blockade and the Kondo effect in single-atom transistors," Nature, Nature, vol. 417(6890), pages 722-725, June.
    2. Romain Vincent & Svetlana Klyatskaya & Mario Ruben & Wolfgang Wernsdorfer & Franck Balestro, 2012. "Electronic read-out of a single nuclear spin using a molecular spin transistor," Nature, Nature, vol. 488(7411), pages 357-360, August.
    3. James O. Thomas & Bart Limburg & Jakub K. Sowa & Kyle Willick & Jonathan Baugh & G. Andrew D. Briggs & Erik M. Gauger & Harry L. Anderson & Jan A. Mol, 2019. "Understanding resonant charge transport through weakly coupled single-molecule junctions," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    4. Wolfgang Wernsdorfer & Núria Aliaga-Alcalde & David N. Hendrickson & George Christou, 2002. "Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets," Nature, Nature, vol. 416(6879), pages 406-409, March.
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    Cited by:

    1. Feng Wang & Wangqiang Shen & Yuan Shui & Jun Chen & Huaiqiang Wang & Rui Wang & Yuyuan Qin & Xuefeng Wang & Jianguo Wan & Minhao Zhang & Xing Lu & Tao Yang & Fengqi Song, 2024. "Electrically controlled nonvolatile switching of single-atom magnetism in a Dy@C84 single-molecule transistor," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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