Anomalous momentum dependence of the multiband electronic structure of FeSe1-xTex Superconductors induced by atomic disorder

Takaaki Sudayama, Daiki Ootsuki, Yuki Wakisaka, Takashi Mizokawa, Naurang L. Saini, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Takashi Noji, Yoji Koike

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


When periodicity of crystal is disturbed by atomic disorder, its electronic state tends to be inhomogeneous and band dispersion is expected to be obscured. In case of Fe-based superconductors, disorder of chalcogen/pnictogen height is known to cause disorder of Fe 3d level splitting. Here, we report an angle-resolved photoemission spectroscopy study on FeSe1-xTe x with the chalcogen height disorder, showing that the disorder affects the Fe 3d band dispersions in an orbital-selective way instead of simple obscuring effect. The reverse of the Fe 3d level splitting due to the chalcogen height difference causes the splitting of the hole band with Fe 3d x2-y2 character around the Γ point.

Original languageEnglish
Article number053705
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 2013 May
Externally publishedYes


  • Angle-resolved photoemission spectroscopy
  • Fe-based superconductors
  • Inhomogeneity
  • Orbital degeneracy

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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