Coherent spin dynamics of solitons in the ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Coherent spin dynamics of solitons in the organic spin chain compounds (o-DMTTF)2X(X=Cl,Br)
Auteur(s) :
Zeisner, J. [Auteur]
Pilone, O. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Soriano, L. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Gerbaud, G. [Auteur]
Bioénergétique et Ingénierie des Protéines [BIP ]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Jeannin, O. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Fourmigué, M. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Büchner, B. [Auteur]
Kataev, V. [Auteur]
Bertaina, S. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Pilone, O. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Soriano, L. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Gerbaud, G. [Auteur]
Bioénergétique et Ingénierie des Protéines [BIP ]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Jeannin, O. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Fourmigué, M. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Büchner, B. [Auteur]
Kataev, V. [Auteur]
Bertaina, S. [Auteur]
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Titre de la revue :
Physical Review B
Nom court de la revue :
Phys. Rev. B
Numéro :
100
Pagination :
224414
Éditeur :
American Physical Society (APS)
Date de publication :
2019-12-16
ISSN :
2469-9950
Mot(s)-clé(s) en anglais :
Magnetism
Solitons
Strongly correlated systems
Peierls transition
Organic compounds
Electron paramagnetic resonance
Spin chains
Solitons
Strongly correlated systems
Peierls transition
Organic compounds
Electron paramagnetic resonance
Spin chains
Discipline(s) HAL :
Physique [physics]/Matière Condensée [cond-mat]/Electrons fortement corrélés [cond-mat.str-el]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Résumé en anglais : [en]
We studied the magnetic properties, in particular dynamics, of the correlated spins associated with natural defects in the organic spin chain compounds (o-DMTTF)2X(X=Br,Cl) by means of electron spin resonance (ESR) ...
Lire la suite >We studied the magnetic properties, in particular dynamics, of the correlated spins associated with natural defects in the organic spin chain compounds (o-DMTTF)2X(X=Br,Cl) by means of electron spin resonance (ESR) spectroscopy. Both materials exhibit spin-Peierls transitions at temperatures around 50 K [P. Foury-Leylekian et al., Phys. Rev. B 84, 195134 (2011)], which allow a separation of the properties of defects inside the chains from the magnetic response of the spin chains. Indeed, continuous-wave ESR measurements performed over a wide temperature range evidence the evolution of the spin dynamics from being governed by the spins in the chains at elevated temperatures to a low-temperature regime which is dominated by defects within the spin-dimerized chains. Such defects polarize the antiferromagnetically coupled spins in their vicinity, thereby leading to a finite local alternating magnetization around the defect site which can be described in terms of a soliton, i.e., a spin-12 quasiparticle built of many correlated spins, pinned to the defect. In addition, contributions of triplon excitations of the spin-dimerized state to the ESR response below the transition temperature were observed, which provides a spectroscopic estimate for the spin gap of the studied systems. Moreover, details of spin dynamics deep in the spin-Peierls phase were investigated by pulse ESR experiments which revealed Rabi oscillations as signatures of coherent spin dynamics. The latter is a prerequisite for a selective manipulation of the defect-induced soliton spin states which is, for instance, relevant in the context of quantum computation. From a comparison of the characteristic damping times of the Rabi oscillations with measurements of the spin relaxation times by means of primary-echo decay and Carr-Purcell-Meiboom-Gill methods, it becomes evident that inhomogeneities in local magnetic fields strongly contribute to the soliton decoherence.Lire moins >
Lire la suite >We studied the magnetic properties, in particular dynamics, of the correlated spins associated with natural defects in the organic spin chain compounds (o-DMTTF)2X(X=Br,Cl) by means of electron spin resonance (ESR) spectroscopy. Both materials exhibit spin-Peierls transitions at temperatures around 50 K [P. Foury-Leylekian et al., Phys. Rev. B 84, 195134 (2011)], which allow a separation of the properties of defects inside the chains from the magnetic response of the spin chains. Indeed, continuous-wave ESR measurements performed over a wide temperature range evidence the evolution of the spin dynamics from being governed by the spins in the chains at elevated temperatures to a low-temperature regime which is dominated by defects within the spin-dimerized chains. Such defects polarize the antiferromagnetically coupled spins in their vicinity, thereby leading to a finite local alternating magnetization around the defect site which can be described in terms of a soliton, i.e., a spin-12 quasiparticle built of many correlated spins, pinned to the defect. In addition, contributions of triplon excitations of the spin-dimerized state to the ESR response below the transition temperature were observed, which provides a spectroscopic estimate for the spin gap of the studied systems. Moreover, details of spin dynamics deep in the spin-Peierls phase were investigated by pulse ESR experiments which revealed Rabi oscillations as signatures of coherent spin dynamics. The latter is a prerequisite for a selective manipulation of the defect-induced soliton spin states which is, for instance, relevant in the context of quantum computation. From a comparison of the characteristic damping times of the Rabi oscillations with measurements of the spin relaxation times by means of primary-echo decay and Carr-Purcell-Meiboom-Gill methods, it becomes evident that inhomogeneities in local magnetic fields strongly contribute to the soliton decoherence.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Équipe(s) de recherche :
Propriétés magnéto structurales des matériaux (PMSM)
Date de dépôt :
2021-06-17T13:14:50Z
2021-06-24T13:12:49Z
2021-09-14T13:15:40Z
2021-06-24T13:12:49Z
2021-09-14T13:15:40Z
Fichiers
- Zeisner et al. - 2019 - Coherent spin dynamics of solitons in the organic spin chain compounds math mrow msub mrow mo(mo miomi mtext-DMT.pdf
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