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Quantum spin fluctuations in the spin-liquid state of Tb₂Ti₂O₇
Hiroshi Takatsu1, Hiroaki Kadowaki, Taku J Sato
1Department of Physics, Tokyo Metropolitan University, Hachioji-shi, Tokyo 192-0397, Japan.
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.
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