Abstract
A hidden order that emerges in the frustrated pyrochlore Tb2+xTi2-xO7+y with Tc=0.53 K is studied using specific heat, magnetization, and neutron scattering experiments on a high-quality single crystal. Semiquantitative analyses based on a pseudospin-1/2 Hamiltonian for ionic non-Kramers magnetic doublets demonstrate that it is an ordered state of electric quadrupole moments. The elusive spin liquid state of the nominal Tb2Ti2O7 is most likely a U(1) quantum spin-liquid state.
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CITATION STYLE
Takatsu, H., Onoda, S., Kittaka, S., Kasahara, A., Kono, Y., Sakakibara, T., … Kadowaki, H. (2016). Quadrupole Order in the Frustrated Pyrochlore Tb2+x Ti2-x O7+y. Physical Review Letters, 116(21). https://doi.org/10.1103/PhysRevLett.116.217201
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