SmB6 Photoemission: Past and Present
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SmB6 Photoemission: Past and Present

  • Author(s): Denlinger, JD
  • Allen, JW
  • Kang, J-S
  • Sun, K
  • Min, B-I
  • Kim, D-J
  • Fisk, Z
  • et al.
Creative Commons Attribution 4.0 International Public License

Recent renewed interest in the mixed valent insulator SmB6 comes from topological theory predictions and surface transport measurements of possible in-gap surface states whose existence is most directly probed by angle-resolved photoemission spectroscopy (ARPES). Early photoemission leading up to a recent flurry of ARPES studies of in-gap states is reviewed. Conflicting interpretations about the nature of the Sm 4f-5d hybridization gap and observed X-point bands between the f-states and the Fermi level are critically assessed using the important tools of photon polarization and spatial dependence which also provide additional insight into the origin of the more ambiguous {\Gamma}-point in-gap states.

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