Anisotropic Propagating Excitations and Quadrupolar Effects in Tb 2 Ti 2 O 7

Abstract : The dynamical magnetic correlations in Tb2Ti2O7 have been investigated using polarized inelastic neutron scattering. Dispersive excitations are observed, emerging from pinch points in reciprocal space and characterized by an anisotropic spectral weight. Anomalies in the crystal field and phonon excitation spectrum at Brillouin zone centers are also reported. These findings suggest that Coulomb phases, although they present a disordered ground state with dipolar correlations, allow the propagation of collective excitations. They also point out a strong spin-lattice coupling, which likely drives effective interactions between the 4f quadrupolar moments.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2013, 111 (8), 〈10.1103/PhysRevLett.111.087201〉
Liste complète des métadonnées

https://hal-cea.archives-ouvertes.fr/cea-01477940
Contributeur : Dominique Girard <>
Soumis le : lundi 27 février 2017 - 17:37:51
Dernière modification le : vendredi 16 mars 2018 - 01:14:53
Document(s) archivé(s) le : dimanche 28 mai 2017 - 14:31:39

Fichier

1305.6363.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Solène Guitteny, Julien Robert, Pierre Bonville, Jacques Ollivier, Claudia Decorse, et al.. Anisotropic Propagating Excitations and Quadrupolar Effects in Tb 2 Ti 2 O 7. Physical Review Letters, American Physical Society, 2013, 111 (8), 〈10.1103/PhysRevLett.111.087201〉. 〈cea-01477940〉

Partager

Métriques

Consultations de la notice

36

Téléchargements de fichiers

43