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Journal articles
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.
https://hal-cea.archives-ouvertes.fr/cea-01477940
Contributor : Dominique Girard <>
Submitted on : Monday, February 27, 2017 - 5:37:51 PM
Last modification on : Wednesday, September 16, 2020 - 5:12:09 PM
Long-term archiving on: : Sunday, May 28, 2017 - 2:31:39 PM
Contributor : Dominique Girard <>
Submitted on : Monday, February 27, 2017 - 5:37:51 PM
Last modification on : Wednesday, September 16, 2020 - 5:12:09 PM
Long-term archiving on: : Sunday, May 28, 2017 - 2:31:39 PM
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1305.6363.pdf
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