Interaction driven subgap spin exciton in the Kondo insulator SmB6.

  title={Interaction driven subgap spin exciton in the Kondo insulator SmB6.},
  author={W. Fuhrman and J. Leiner and P. Nikolic and G. Granroth and M. Stone and M. Lumsden and L. Debeer-Schmitt and P. Alekseev and J. Mignot and S. Koohpayeh and P. Cottingham and William Phelan and L. Schoop and T. McQueen and C. Broholm},
  journal={Physical review letters},
  volume={114 3},
  • W. Fuhrman, J. Leiner, +12 authors C. Broholm
  • Published 2015
  • Physics, Medicine
  • Physical review letters
  • Using inelastic neutron scattering, we map a 14 meV coherent resonant mode in the topological Kondo insulator SmB6 and describe its relation to the low energy insulating band structure. The resonant intensity is confined to the X and R high symmetry points, repeating outside the first Brillouin zone and dispersing less than 2 meV, with a 5d-like magnetic form factor. We present a slave-boson treatment of the Anderson Hamiltonian with a third neighbor dominated hybridized band structure. This… CONTINUE READING
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