Novel neutron resonance mode in dx2-y2-wave superconductors.

@article{Eremin2005NovelNR,
  title={Novel neutron resonance mode in dx2-y2-wave superconductors.},
  author={I. Eremin and D. Morr and A. Chubukov and K. Bennemann and M. Norman},
  journal={Physical review letters},
  year={2005},
  volume={94 14},
  pages={
          147001
        }
}
We show that a new resonant magnetic excitation at incommensurate momenta, observed recently by inelastic neutron scattering experiments on YBa2Cu3O6.85 and YBa2Cu3O6.6, is a spin exciton. Its location in the Brillouin zone and its frequency are determined by the momentum dependence of the particle-hole continuum. We identify several features that distinguish this novel mode from the previous resonance mode observed near Q=(pi,pi). 

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