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Electric control of magnetic exchange in a molecular spin triangle

Author

Listed:
  • Alberto Cini

    (University of Florence and INSTM UdR)

  • Michael Böhme

    (Humboldtstraße 8)

  • Benjamin Kintzel

    (Humboldtstraße 8)

  • Mauro Perfetti

    (University of Florence and INSTM UdR)

  • Winfried Plass

    (Humboldtstraße 8)

  • Roberta Sessoli

    (University of Florence and INSTM UdR)

  • Maria Fittipaldi

    (University of Florence and INSTM UdR)

Abstract

Spin-electric effects are crucial for quantum technologies, offering several advantages over standard magnetic field-based spin control. Seeking a mechanism independent of spin-orbit interaction, here we report the detection of a spin-electric effect in the [Cu3(saltag)(py)6]ClO4 spin triangle. The effect is investigated by electron paramagnetic resonance under electric field modulation on single crystals. The anisotropy of the magnetic response to the electric field is addressed, and comprehensive ab initio calculations are performed to elucidate its origin. We demonstrate that when the electric field is applied in the plane of the triangle, the dominant contribution to the observed spin-electric signal arises from a variation of the isotropic exchange interaction. Our combined theoretical and experimental approach demonstrates that, in our system, there is no evidence of antisymmetric exchange (Dzyaloshinskii-Moriya) interaction, confirming that electric-field control of magnetic exchange is achievable in the absence of significant spin–orbit coupling. Moreover, we underscore the crucial role of the bridging ligand, which opens new avenues for chemically optimizing spin–electric coupling.

Suggested Citation

  • Alberto Cini & Michael Böhme & Benjamin Kintzel & Mauro Perfetti & Winfried Plass & Roberta Sessoli & Maria Fittipaldi, 2025. "Electric control of magnetic exchange in a molecular spin triangle," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-61417-6
    DOI: 10.1038/s41467-025-61417-6
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    References listed on IDEAS

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    1. Florian Mardelé & Ivan Mohelský & Jan Wyzula & Milan Orlita & Philippe Turek & Filippo Troiani & Athanassios K. Boudalis, 2025. "Probing spin-electric transitions in a molecular exchange qubit," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    2. D.I. Khomskii, 2012. "Electric dipoles on magnetic monopoles in spin ice," Nature Communications, Nature, vol. 3(1), pages 1-5, January.
    3. B. E. Kane, 1998. "A silicon-based nuclear spin quantum computer," Nature, Nature, vol. 393(6681), pages 133-137, May.
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