Electronic structure reconstruction by orbital symmetry breaking in IrTe2

Daiki Ootsuki, Sunseng Pyon, Kazutaka Kudo, Minoru Nohara, Masafumi Horio, Teppei Yoshida, Atsushi Fujimori, Masashi Arita, Hiroaki Anzai, Hirofumi Namatame, Masaki Taniguchi, Naurang L. Saini, Takashi Mizokawa

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


We report an angle-resolved photoemission spectroscopy (ARPES) study on IrTe2 which exhibits an interesting lattice distortion below 270 K and becomes triangular lattice superconductors by suppressing the distortion via chemical substitution or intercalation. ARPES results at 300 K show multi-band Fermi surfaces with six-fold symmetry which are basically consistent with band structure calculations. At 20 K in the distorted phase, topology of the inner Fermi surfaces is strongly modified by the lattice distortion. The Fermi surface reconstruction by the distortion depends on the orbital character of the Fermi surfaces, suggesting importance of Ir 5d and/or Te 5p orbital symmetry breaking.

Original languageEnglish
Article number093704
Journaljournal of the physical society of japan
Issue number9
Publication statusPublished - 2013 Sept
Externally publishedYes


  • Angle-resolved photoemission spectroscopy
  • IrTe
  • Orbital degeneracy
  • Structural phase transition

ASJC Scopus subject areas

  • General Physics and Astronomy


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