Electron spins interactions in the spin-Peierls phase of the organic spin chain compounds (o-DMTTF)<sub>2</sub>X (X=Cl,Br and I)
ORAL
Abstract
The gapped spin chains systems are usually non magnetic at low temperature however a break in translational symmetry can create a S = ½ ground state. The defect polarizes a large number of spins around it and pinnes a magnetic soliton [1]. By means of Electron Spin Resonance spectroscopy we report the experimental quantum coherence of a soliton of spin ½ [2,3] and a soliton-dimer with the quantum dynamics of a spin 1. We show the soliton can be either single or paired with a large exchange coupling and a probability of 50 % due to the one-dimensionnal nature of the system [4].
*Work supported by the Agence Nationale de la Recherche ANR "DySCORDE" (ANR-20-CE29-0011) and the CNRS infrastructure RENARD (Grant No. IR-RPE CNRS 3443)
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Publication: [1] E. Sørensen et al., Phys. 682 Rev. B 58, R14701 (1998).
[2] J. Zeisner et al. Phys. Rev. B 100, 224414 (2019)
[3] L. Soriano et al. Appl. Magn. Reson. 51, 1307 (2020).
[4] L.Soriano et al, « Electron spins interaction in the spin-Peierls phase of the organic spin chain (o -DMTTF)2X (X = Cl, Br, I) », submitted.
Presenters
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Loïc P Soriano
- CNRS, Aix-Marseille Université, IM2NP (UMR 7334), Institut Matériaux Microélectronique et Nanosciences de Provence, Marseille, France