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

doi: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 Ir_1-xPt_xTe₂

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

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

We report an angle-resolved photoemission spectroscopy (ARPES) study on a triangular lattice superconductor Ir_1-xPt_xTe₂ 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.

Original language	English
Article number	033704
Journal	journal of the physical society of japan
Volume	83
Issue number	3
DOIs	https://doi.org/10.7566/JPSJ.83.033704
Publication status	Published - Mar 15 2014

ASJC Scopus subject areas

Physics and Astronomy(all)

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Ootsuki, D., Toriyama, T., Kobayashi, M., Pyon, S., Kudo, K., Nohara, M., Sugimoto, T., Yoshida, T., Horio, M., Fujimori, A., Arita, M., Anzai, H., Namatame, H., Taniguchi, M., Saini, N. L., Konishi, T., Ohta, Y., & Mizokawa, T. (2014). Important roles of Te 5p and Ir 5d spin-orbit interactions on the multi-band electronic structure of triangular lattice superconductor Ir_1-xPt_xTe₂. journal of the physical society of japan, 83(3), [033704]. https://doi.org/10.7566/JPSJ.83.033704

Ootsuki, D, Toriyama, T, Kobayashi, M, Pyon, S, Kudo, K, Nohara, M, Sugimoto, T, Yoshida, T, Horio, M, Fujimori, A, Arita, M, Anzai, H, Namatame, H, Taniguchi, M, Saini, NL, Konishi, T, Ohta, Y & Mizokawa, T 2014, 'Important roles of Te 5p and Ir 5d spin-orbit interactions on the multi-band electronic structure of triangular lattice superconductor Ir_1-xPt_xTe₂', journal of the physical society of japan, vol. 83, no. 3, 033704. https://doi.org/10.7566/JPSJ.83.033704

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

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.",

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

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AU - Ootsuki, Daiki

AU - Toriyama, Tatsuya

AU - Kobayashi, Masakazu

AU - Pyon, Sunseng

AU - Kudo, Kazutaka

AU - Nohara, Minoru

AU - Sugimoto, Takuya

AU - Yoshida, Teppei

AU - Horio, Masafumi

AU - Fujimori, Atsushi

AU - Arita, Masashi

AU - Anzai, Hiroaki

AU - Namatame, Hirofumi

AU - Taniguchi, Masaki

AU - Saini, Naurang L.

AU - Konishi, Takehisa

AU - Ohta, Yukinori

AU - Mizokawa, Takashi

PY - 2014/3/15

Y1 - 2014/3/15

N2 - 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.

AB - 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.

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Important roles of Te 5p and Ir 5d spin-orbit interactions on the multi-band electronic structure of triangular lattice superconductor Ir_1-xPt_xTe₂

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