Coherent spin dynamic of strongly correlated defects in spin chains.

ORAL

Abstract

The quantum coherence of spins is usually studied in highly diluted magnetic ions in a diamagnetic medium. We propose a new paradigm: a non-magnetic defect, like a break in the translational symmetry of Heisenberg’s spin chain, polarized many spins around it.
We show that this correlated spin system that is made of hundreds of coupled spins bear an overall spin S = 1/2 and can be manipulated as a single spin. By means of pulsed electron paramagnetic resonance, we show the quantum coherence of this object by measuring the Rabi oscillations. We show that the spin bath decoherence is strongly reduced by the strong isotropic exchange interaction.

1. J. Zeisner, et al Phys. Rev. B. 100, 224414 (2019). arXiv:1909.10301
2. L. Soriano, et al. Applied Magnetic Resonance (2020), arXiv:2008.10897.

*EPR measurements were supported by the Centre National de la Recherche Scientifique (CNRS) research infrastructure RENARD (Grant No. IR-RPE CNRS 3443).

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Presenters

  • Sylvain Bertaina

    • Aix-Marseille university,CNRS,IM2NP UMR 7334,Marseille, France
    • Aix-Marseille Universite, CNRS, IM2NP UMR 7334, Marseille, France

Authors

  • Sylvain Bertaina

    • Aix-Marseille university,CNRS,IM2NP UMR 7334,Marseille, France
    • Aix-Marseille Universite, CNRS, IM2NP UMR 7334, Marseille, France

  • Loic Soriano

    • Aix-Marseille Universite, CNRS, IM2NP UMR 7334, Marseille, France

  • julian zeisner

    • Leibniz Institute for Solid State and Materials Research IFW Dresden, 01069 Dresden, Germany
    • Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01069 Dresden, Germany

  • Vladislav kataev

    • Leibniz Institute for Solid State and Materials Research IFW Dresden, 01069 Dresden, Germany
    • Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01069 Dresden, Germany

  • Hervé Vezin

    • Université de Lille, CNRS, LASIR UMR 8516, 59665 Villeneuve d'Ascq, France
    • Universite de Lille, CNRS, LASIR UMR 8516, F-59655 Villeneuve d’Ascq, France
    • Laboratoire de Spectrochimie Infrarouge et Raman, UMR8516, CNRS, Universite de Lille, Villeneuve d'Ascq, France

  • Marc Fourmigué

    • Université de Rennes, CNRS,ISCR UMR 6226,35042 Rennes, France
    • Universite de Rennes, CNRS, ISCR UMR 6226, F-35042 Rennes, France

  • Maylis Orio

    • Aix-Marseille university,CNRS,ISM2 UMR 7313,Marseille, France
    • Aix-Marseille Universite, CNRS, ISM2 UMR 7313, Marseille, France