Important Roles of Te 5p and Ir 5d Spin–Orbit Interactions on the Multi-band Electronic Structure of Triangular Lattice Superconductor Ir1−xPtxTe2

• DOI: 10.7566/jpsj.83.033704
• Publication Date: 2014-02-17T01:00:40Z
• Authors: 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
• Keywords: Spin–orbit interaction; Hexagonal Lattice

We report an angle-resolved photoemission spectroscopy (ARPES) study on a triangular lattice superconductor Ir$_{1-x}$Pt$_{x}$Te$_2$ in which the Ir-Ir or Te-Te bond formation, band Jahn-Teller effect, and spin-orbit interaction are cooperating competing with one another. The Fermi surfaces of substituted system qualitatively similar to structure calculations for undistorted IrTe$_2$ upward chemical potential shift due electron doping. A combination ARPES indicates that Te $5p$ removes $p_x/p_y$ orbital degeneracy induces $p_x \pm ip_y$ type coupling near point. inner outer entangled by Ir $5d$ interactions may provide exotic superconductivity singlet-triplet mixing.