TY - JOUR
T1 - Bulk nature of layered perovskite iridates beyond the Mott scenario
T2 - An approach from a bulk-sensitive photoemission study
AU - Yamasaki, A.
AU - Tachibana, S.
AU - Fujiwara, H.
AU - Higashiya, A.
AU - Irizawa, A.
AU - Kirilmaz, O.
AU - Pfaff, F.
AU - Scheiderer, P.
AU - Gabel, J.
AU - Sing, M.
AU - Muro, T.
AU - Yabashi, M.
AU - Tamasaku, K.
AU - Sato, H.
AU - Namatame, H.
AU - Taniguchi, M.
AU - Hloskovskyy, A.
AU - Yoshida, H.
AU - Okabe, H.
AU - Isobe, M.
AU - Akimitsu, J.
AU - Drube, W.
AU - Claessen, R.
AU - Ishikawa, T.
AU - Imada, S.
AU - Sekiyama, A.
AU - Suga, S.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/3/24
Y1 - 2014/3/24
N2 - We present genuine bulk Ir 5d jeff states of layered perovskite iridates obtained by hard-x-ray photoemission spectroscopy (HAXPES) with s- and p-polarized lights. HAXPES spectra of Sr2IrO4 and Ba2IrO4 are well reproduced by the quasiparticle density of states calculated by the local density approximation with dynamical mean-field theory (LDA+DMFT). It is demonstrated that the insulating nature of the iridates is triggered by antiferromagnetic correlation (Slater type) combined with electron correlation (Mott type). The extremely-low-energy bulk-sensitive photoemission spectroscopy reveals "bad metallic" states in the paramagnetic phase of the iridates, suggesting strongly renormalized metallic states above the Néel temperature as predicted by the LDA+DMFT.
AB - We present genuine bulk Ir 5d jeff states of layered perovskite iridates obtained by hard-x-ray photoemission spectroscopy (HAXPES) with s- and p-polarized lights. HAXPES spectra of Sr2IrO4 and Ba2IrO4 are well reproduced by the quasiparticle density of states calculated by the local density approximation with dynamical mean-field theory (LDA+DMFT). It is demonstrated that the insulating nature of the iridates is triggered by antiferromagnetic correlation (Slater type) combined with electron correlation (Mott type). The extremely-low-energy bulk-sensitive photoemission spectroscopy reveals "bad metallic" states in the paramagnetic phase of the iridates, suggesting strongly renormalized metallic states above the Néel temperature as predicted by the LDA+DMFT.
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U2 - 10.1103/PhysRevB.89.121111
DO - 10.1103/PhysRevB.89.121111
M3 - Article
AN - SCOPUS:84898717773
VL - 89
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 12
M1 - 121111
ER -