TY - JOUR
T1 - Bond order and the role of ligand states in stripe-modulated IrTe2
AU - Takubo, K.
AU - Comin, R.
AU - Ootsuki, D.
AU - Mizokawa, T.
AU - Wadati, H.
AU - Takahashi, Y.
AU - Shibata, G.
AU - Fujimori, A.
AU - Sutarto, R.
AU - He, F.
AU - Pyon, S.
AU - Kudo, K.
AU - Nohara, M.
AU - Levy, G.
AU - Elfimov, I. S.
AU - Sawatzky, G. A.
AU - Damascelli, A.
PY - 2014/8/7
Y1 - 2014/8/7
N2 - The coupled electronic-structural modulations of the ligand states in IrTe2 have been studied by x-ray absorption spectroscopy and resonant elastic x-ray scattering (REXS). Distinctive preedge structures are observed at the Te-M4,5 (3d → 5p) absorption edge, indicating the presence of a Te 5p-Ir 5d covalent state near the Fermi level. An enhancement of the REXS signal near the Te 3d → 5p resonance at the Q=(1/5,0,-1/5) superlattice reflection is observed below the structural transition temperature Ts∼280 K. The analysis of the energy-dependent REXS line shape reveals the key role played by the spatial modulation of the covalent Te 5p-Ir 5d bond density in driving the stripelike order in IrTe2, and uncovers its coupling with the charge and/or orbital order at the Ir sites. The similarity between these findings and the charge-ordering phenomenology recently observed in the high-temperature superconducting cuprates suggests that the iridates may harbor similar exotic phases.
AB - The coupled electronic-structural modulations of the ligand states in IrTe2 have been studied by x-ray absorption spectroscopy and resonant elastic x-ray scattering (REXS). Distinctive preedge structures are observed at the Te-M4,5 (3d → 5p) absorption edge, indicating the presence of a Te 5p-Ir 5d covalent state near the Fermi level. An enhancement of the REXS signal near the Te 3d → 5p resonance at the Q=(1/5,0,-1/5) superlattice reflection is observed below the structural transition temperature Ts∼280 K. The analysis of the energy-dependent REXS line shape reveals the key role played by the spatial modulation of the covalent Te 5p-Ir 5d bond density in driving the stripelike order in IrTe2, and uncovers its coupling with the charge and/or orbital order at the Ir sites. The similarity between these findings and the charge-ordering phenomenology recently observed in the high-temperature superconducting cuprates suggests that the iridates may harbor similar exotic phases.
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U2 - 10.1103/PhysRevB.90.081104
DO - 10.1103/PhysRevB.90.081104
M3 - Article
AN - SCOPUS:84905734540
SN - 0163-1829
VL - 90
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 8
M1 - 081104
ER -