title: Power-law spin correlations in the pyrochlore antiferromagnet Tb(2)Ti(2)O(7).
abstract: We investigate the low-temperature state of the rare-earth pyrochlore Tb(2)Ti(2)O(7) using polarized neutron scattering. Tb(2)Ti(2)O(7) is often described as an antiferromagnetic spin liquid with spin correlations extending over lengths comparable to individual tetrahedra of the pyrochlore lattice. We confirm this picture at 20 K but find that at 0.05 K the data contain evidence of pinch-point scattering, suggesting that the low temperature state of Tb(2)Ti(2)O(7) has power-law spin correlations.
authors.affiliation: Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. tom.fennell@psi.ch
authors.forename: T
authors.initials: T
authors.lastname: Fennell
authors.forename: M
authors.initials: M
authors.lastname: Kenzelmann
authors.forename: B
authors.initials: B
authors.lastname: Roessli
authors.forename: M K
authors.initials: MK
authors.lastname: Haas
authors.forename: R J
authors.initials: RJ
authors.lastname: Cava