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

doi:10.7566/JPSJ.82.093704

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 journal › Article › peer-review

60 Citations (Scopus)

Abstract

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 language	English
Article number	093704
Journal	journal of the physical society of japan
Volume	82
Issue number	9
DOIs	https://doi.org/10.7566/JPSJ.82.093704
Publication status	Published - 2013 Sept
Externally published	Yes

Keywords

Angle-resolved photoemission spectroscopy
IrTe
Orbital degeneracy
Structural phase transition

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.7566/JPSJ.82.093704

Cite this

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title = "Electronic structure reconstruction by orbital symmetry breaking in IrTe2",

abstract = "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.",

keywords = "Angle-resolved photoemission spectroscopy, IrTe, Orbital degeneracy, Structural phase transition",

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

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language = "English",

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journal = "Journal of the Physical Society of Japan",

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TY - JOUR

T1 - Electronic structure reconstruction by orbital symmetry breaking in IrTe2

AU - Ootsuki, Daiki

AU - Pyon, Sunseng

AU - Kudo, Kazutaka

AU - Nohara, Minoru

AU - Horio, Masafumi

AU - Yoshida, Teppei

AU - Fujimori, Atsushi

AU - Arita, Masashi

AU - Anzai, Hiroaki

AU - Namatame, Hirofumi

AU - Taniguchi, Masaki

AU - Saini, Naurang L.

AU - Mizokawa, Takashi

PY - 2013/9

Y1 - 2013/9

N2 - 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.

AB - 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.

KW - Angle-resolved photoemission spectroscopy

KW - IrTe

KW - Orbital degeneracy

KW - Structural phase transition

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