Electron spin resonance of defects in the organic spin chains compounds (o-DMTTF)<sub>2</sub>X

POSTER

Abstract

Defects in spin chains were a subject of great interest over the last decades.The spin-Peierls systems like the organic spin chains compounds (o-DMTTF)2X (X = Cl,Br,I) have an S = 0 ground state. However it is known [1] that a break in the translational symmetry induces S = 1/2 ground state made by hundreds of spins of the chain. A low temperature paramagnetic signal is often observed and commonly attributed to extrinsic impurities.
By means of Electron Paramagnetic Resonance on (o-DMTTF)2X ,we show that the paramagnetic signal is intrinsic to the chain. Despite an important concentration of spins, we observed a long relaxation and coherence times and we performed Rabi oscillations on this two levels N body system [2].These characteristics are compatible with quantum information processing. We present the role of isotropic Heisenberg exchange interaction in the reduction of relaxation effect du to the spin bath.

*
[1] D.Augier,"Couplage electron-phonon dans les systèmes de basse dimensionnalité : application aux composés spin-Peierls", PhD Thesis
[2] J. Zeisner, O. Pilone, L. Soriano, G. Gerbaud, H. Vezin, O. Jeannin, M. Fourmigue, B. Buchner, V. Kataev, S. Bertaina, Phys. Rev. B 100(22), 224414 (2019)

Presenters

  • Loïc Soriano

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

Authors

  • Loïc Soriano

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

  • Sylvain Bertaina

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

  • Marc Fourmigué

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

  • 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

  • Maylis Orio

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