Important roles of Te 5p and Ir 5d spin-orbit interactions on the multi-band electronic structure of triangular lattice superconductor Ir1-xPtxTe2

Daiki Ootsuki, Tatsuya Toriyama, Masakazu Kobayashi, Sunseng Pyon, Kazutaka Kudo, Minoru Nohara, Takuya Sugimoto, Teppei Yoshida, Masafumi Horio, Atsushi Fujimori, Masashi Arita, Hiroaki Anzai, Hirofumi Namatame, Masaki Taniguchi, Naurang L. Saini, Takehisa Konishi, Yukinori Ohta, Takashi Mizokawa

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15 Citations (Scopus)

Abstract

We report an angle-resolved photoemission spectroscopy (ARPES) study on a triangular lattice superconductor Ir1-xPtxTe2 in which the Ir-Ir or Te-Te bond formation, the band Jahn-Teller effect, and the spin-orbit interaction are cooperating and competing with one another. The Fermi surfaces of the substituted system are qualitatively similar to the band structure calculations for the undistorted IrTe2 with an upward chemical potential shift due to electron doping. A combination of the ARPES and the band structure calculations indicates that the Te 5p spin-orbit interaction removes the px/py orbital degeneracy and induces px ± ipy type spin-orbit coupling near the A point. The inner and outer Fermi surfaces are entangled by the Te 5p and Ir 5d spin-orbit interactions which may provide exotic superconductivity with singlet-triplet mixing.

Original languageEnglish
Article number033704
Journaljournal of the physical society of japan
Volume83
Issue number3
DOIs
Publication statusPublished - 2014 Mar 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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