The effect of magnetic field on the quantum spin liquid state of Tb$_{2+x}$Ti$_{2-x}$O$_{7+y}$
We have shown, using inelastic single crystal neutron scattering on IN5, that the frustrated pyrochlore magnet Tb2+xTi2-xO7+y (TTO) for x<-0.0025 has a quantum spin liquid (QSL) ground state with short-range spin-fluctuations centered at Q=(1/2,1/2,1/2). In order to better understand these fluctuations and their role in the proximity of the quantum critical point to a hidden ordered state for x>-=0.007, which is possibly a planar (anti-)ferropseudospin state, we propose to study these fluctuations in a vertical magnetic field on the cold triple-axis spectrometer Thales. We expect that a field along [1,-1,0] will decouple the three-dimensional (3D) QSL state into one-dimensional (1D) QSL chains and polarized magnetic chains. Such a dimensional control from 3D to 1D will provide important information for understanding the QSL state in TTO.
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FAK Bjorn; BOEHM Martin and KADOWAKI Hiroaki. (2016). The effect of magnetic field on the quantum spin liquid state of Tb$_{2+x}$Ti$_{2-x}$O$_{7+y}$. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-651
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