Antiferromagnetic spin ice correlations at (12,12,12) in the ground state of the pyrochlore magnet Tb2Ti2O7 Academic Article uri icon

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abstract

  • We present high-resolution single crystal time-of-flight neutron scattering measurements on the candidate quantum spin liquid pyrochlore Tb2Ti2O7 at low temperature and in a magnetic field. At ~70 mK and in zero field, Tb2Ti2O7 reveals diffuse magnetic elastic scattering at (1/2,1/2,1/2) positions in reciprocal space, consistent with short-range correlated regions based on a two-in, two-out spin ice configuration on a doubled conventional unit cell. This elastic scattering is separated from very low-energy magnetic inelastic scattering by an energy gap of ~0.06-0.08 meV. The elastic signal disappears under the application of small magnetic fields and upon elevating temperature. Pinch-point-like elastic diffuse scattering is observed near (1,1,1) and (0,0,2) in zero field at ~70 mK, in agreement with Fennell et al. (Ref. 1), supporting the quantum spin ice interpretation of Tb2Ti2O7.

authors

  • Fritsch, K
  • Ross, KA
  • Qiu, Y
  • Copley, JRD
  • Guidi, T
  • Bewley, RI
  • Dabkowska, HA
  • Gaulin, Bruce D

publication date

  • March 11, 2013