Bulk nature of layered perovskite iridates beyond the Mott scenario: An approach from a bulk-sensitive photoemission study

A. Yamasaki; S. Tachibana; H. Fujiwara; A. Higashiya; A. Irizawa; O. Kirilmaz; F. Pfaff; P. Scheiderer; J. Gabel; M. Sing; T. Muro; M. Yabashi; K. Tamasaku; H. Sato; H. Namatame; M. Taniguchi; A. Hloskovskyy; H. Yoshida; H. Okabe; M. Isobe; J. Akimitsu; W. Drube; R. Claessen; T. Ishikawa; S. Imada; A. Sekiyama; S. Suga

doi:10.1103/PhysRevB.89.121111

Bulk nature of layered perovskite iridates beyond the Mott scenario: An approach from a bulk-sensitive photoemission study

A. Yamasaki, S. Tachibana, H. Fujiwara, A. Higashiya, A. Irizawa, O. Kirilmaz, F. Pfaff, P. Scheiderer, J. Gabel, M. Sing, T. Muro, M. Yabashi, K. Tamasaku, H. Sato, H. Namatame, M. Taniguchi, A. Hloskovskyy, H. Yoshida, H. Okabe, M. IsobeJ. Akimitsu, W. Drube, R. Claessen, T. Ishikawa, S. Imada, A. Sekiyama, S. Suga

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22 Citations (Scopus)

Abstract

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.

Original language	English
Article number	121111
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.89.121111
Publication status	Published - Mar 24 2014
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.89.121111

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Yamasaki, A., Tachibana, S., Fujiwara, H., Higashiya, A., Irizawa, A., Kirilmaz, O., Pfaff, F., Scheiderer, P., Gabel, J., Sing, M., Muro, T., Yabashi, M., Tamasaku, K., Sato, H., Namatame, H., Taniguchi, M., Hloskovskyy, A., Yoshida, H., Okabe, H., ... Suga, S. (2014). Bulk nature of layered perovskite iridates beyond the Mott scenario: An approach from a bulk-sensitive photoemission study. Physical Review B - Condensed Matter and Materials Physics, 89(12), [121111]. https://doi.org/10.1103/PhysRevB.89.121111

Yamasaki, A, Tachibana, S, Fujiwara, H, Higashiya, A, Irizawa, A, Kirilmaz, O, Pfaff, F, Scheiderer, P, Gabel, J, Sing, M, Muro, T, Yabashi, M, Tamasaku, K, Sato, H, Namatame, H, Taniguchi, M, Hloskovskyy, A, Yoshida, H, Okabe, H, Isobe, M, Akimitsu, J, Drube, W, Claessen, R, Ishikawa, T, Imada, S, Sekiyama, A & Suga, S 2014, 'Bulk nature of layered perovskite iridates beyond the Mott scenario: An approach from a bulk-sensitive photoemission study', Physical Review B - Condensed Matter and Materials Physics, vol. 89, no. 12, 121111. https://doi.org/10.1103/PhysRevB.89.121111

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abstract = "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 N{\'e}el temperature as predicted by the LDA+DMFT.",

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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.

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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Bulk nature of layered perovskite iridates beyond the Mott scenario: An approach from a bulk-sensitive photoemission study

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