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Quadrupole Order in the Frustrated Pyrochlore Tb2+xTi2-xO7+y



H. Takatsu, S. Onoda, S. Kittaka, A. Kasahara, Y. Kono, T. Sakakibara, Y. Kato, B. Fak, J. Ollivier, Jeffrey W. Lynn, T. Taniguchi, H. Kadowaki


A hidden order that emerges in the frustrated pyrochlore Tb2+xTi2-xO7+y with X = 0.005 > xc is studied from specific heat and magnetization experiments on a high-quality single crystal, as well as neutron scattering. Semi-quantitative3 analyses based on a pseudospin-1/2 pyrochlore Hamiltonian for ionic non-Kramers magnetic doublets indicate that it is a long-range of an electric quadrupole. These results suggest the existence for a Higgs phase located close to a U(1) quantum spin-liquid phase of the non-Kramers pyrochlore model.
Physical Review Letters


Hidden Order, Quadrupole Order, Neutron Scattering, Specific Heat, Magnetization, Higgs Phase, spin-liquid


Takatsu, H. , Onoda, S. , Kittaka, S. , Kasahara, A. , Kono, Y. , Sakakibara, T. , Kato, Y. , Fak, B. , Ollivier, J. , Lynn, J. , Taniguchi, T. and Kadowaki, H. (2016), Quadrupole Order in the Frustrated Pyrochlore Tb<sub>2+x</sub>Ti<sub>2-x</sub>O<sub>7+y</sub>, Physical Review Letters, [online], (Accessed April 14, 2024)
Created May 25, 2016, Updated October 12, 2021