Electronic Structure Reconstruction by Orbital Symmetry Breaking in IrTe2

被引：65

作者：

Ootsuki, Daiki ^{[1
,2
]}

Pyon, Sunseng ^{[3
]}

Kudo, Kazutaka ^{[3
]}

Nohara, Minoru ^{[3
]}

Horio, Masafumi ^{[4
]}

Yoshida, Teppei ^{[4
]}

Fujimori, Atsushi ^{[4
]}

Arita, Masashi ^{[5
]}

Anzai, Hiroaki ^{[5
]}

Namatame, Hirofumi ^{[5
]}

Taniguchi, Masaki ^{[5
,6
]}

Saini, Naurang L. ^{[1
,2
,7
]}

Mizokawa, Takashi ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan

[2] Univ Tokyo, Dept Phys, Kashiwa, Chiba 2778561, Japan

[3] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[4] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[5] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7390046, Japan

[6] Hiroshima Univ, Grad Sch Sci, Hiroshima 7390046, Japan

[7] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2013年 / 82卷 / 09期

关键词：

structural phase transition; IrTe2; orbital degeneracy; angle-resolved photoemission spectroscopy; TRANSITION; CUIR2S4;

D O I：

10.7566/JPSJ.82.093704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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