Neutron scattering in the proximate quantum spin liquid α-RuCl 3

To reconstruct dynamical correlations in energy-momentum space. We discovered highly unusual signals, including a column of scattering over a large energy interval around the Brillouin zone center, which is very stable with temperature. This finding is consistent with scattering from the Majorana excitations of a KQSL. Other, more delicate experimental features can be transparently associated with perturbations to an ideal model. Our results encourage further study of this prototypical material and may open a window into investigating emergent magnetic Majorana fermions in correlated materials.

• UD
  U.S. Department of Energy

  Award: award290202
• GA
  Gordon and Betty Moore Foundation

  Award: award290203
• H
  Helmholtz-Gemeinschaft

  Award: award290204
• DF
  Deutsche Forschungsgemeinschaft

  Award: award290205