title: Quantum spin fluctuations in the spin-liquid state of Tb₂Ti₂O₇.
abstract: Neutron scattering experiments on a polycrystalline sample of the frustrated pyrochlore magnet Tb(2)Ti(2)O(7), which does not show any magnetic order down to 50 mK, have revealed that it shows condensation behavior below 0.4 K from a thermally fluctuating paramagnetic state to a spin-liquid ground state with quantum spin fluctuations. Energy spectra change from quasielastic scattering to a continuum with a double-peak structure at energies of 0 and 0.8 K in the spin-liquid state. Specific heat shows an anomaly at the crossover temperature.
authors.affiliation: Department of Physics, Tokyo Metropolitan University, Hachioji-shi, Tokyo 192-0397, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takatsu
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kadowaki
authors.forename: Taku J
authors.initials: TJ
authors.lastname: Sato
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Lynn
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Tabata
authors.forename: Teruo
authors.initials: T
authors.lastname: Yamazaki
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Matsuhira