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@ARTICLE{Arab:827777,
      author       = {Arab, Arian and Gray, A. X. and Nemšák, S. and
                      Evtushinsky, D. V. and Schneider, C. M. and Kim, Dae-Jeong
                      and Fisk, Zachary and Rosa, P. F. S. and Durakiewicz, T. and
                      Riseborough, P. S.},
      title        = {{E}ffects of spin excitons on the surface states of {S}m{B}
                      6 : {A} photoemission study},
      journal      = {Physical review / B},
      volume       = {94},
      number       = {23},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-01881},
      pages        = {235125},
      year         = {2016},
      abstract     = {We present the results of a high-resolution valence-band
                      photoemission spectroscopic study of SmB6 which shows
                      evidence for a V-shaped density of states of surface origin
                      within the bulk gap. The spectroscopy data are interpreted
                      in terms of the existence of heavy 4f surface states, which
                      may be useful in resolving the controversy concerning the
                      disparate surface Fermi-surface velocities observed in
                      experiments. Most importantly, we find that the temperature
                      dependence of the valence-band spectrum indicates that a
                      small feature appears at a binding energy of about −9 meV
                      at low temperatures. We attribute this feature to a
                      resonance caused by the spin-exciton scattering in SmB6
                      which destroys the protection of surface states due to
                      time-reversal invariance and spin-momentum locking. The
                      existence of a low-energy spin exciton may be responsible
                      for the scattering, which suppresses the formation of
                      coherent surface quasiparticles and the appearance of the
                      saturation of the resistivity to temperatures much lower
                      than the coherence temperature associated with the opening
                      of the bulk gap.},
      cin          = {PGI-6},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522)},
      pid          = {G:(DE-HGF)POF3-522},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000390251800001},
      doi          = {10.1103/PhysRevB.94.235125},
      url          = {https://juser.fz-juelich.de/record/827777},
}