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 p(x)/p(y) orbital degeneracy and induces p(x) +/- ip(y) 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.
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; Taniguchi, Masaki; Saini, Naurang Lal; Takehisa, Konishi; Yukinori, Ohta; Takashi, Mizokawa. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - 83:(2014), p. 033704. [10.7566/jpsj.83.033704]
Important Roles of Te 5p and Ir 5d Spin-Orbit Interactions on the Multi-band Electronic Structure of Triangular Lattice Superconductor Ir1-xPtxTe2
SAINI, Naurang Lal;
2014
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 p(x)/p(y) orbital degeneracy and induces p(x) +/- ip(y) 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
