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Yoshida, Masahiro*; Ishii, Kenji; Jarrige, I.*; Watanuki, Tetsu; Kudo, Kazutaka*; Koike, Yoji*; Kumagai, Kenichi*; Hiraoka, Nozomu*; Ishii, Hirofumi*; Tsuei, K.-D.*; et al.
Journal of Synchrotron Radiation, 21(1), p.131 - 135, 2014/01
Times Cited Count:3 Percentile:18.40(Instruments & Instrumentation)Jarrige, I.*; Nomura, Takuji; Ishii, Kenji; Gretarsson, H.*; Kim, Y.-J.*; Kim, J.*; Upton, M.*; Casa, D.*; Gog, T.*; Ishikado, Motoyuki*; et al.
Physical Review B, 86(11), p.115104_1 - 115104_4, 2012/09
Times Cited Count:8 Percentile:34.22(Materials Science, Multidisciplinary)We report the first observation by momentum-resolved resonant inelastic X-ray scattering of charge excitations in an iron-based superconductor and its parent compound, PrFeAsO and PrFeAsO respectively, with two main results. First, using calculations based on a 16 band
model, we show that the energy of the lowest-lying excitations, identified as
interband transitions of dominant
,
orbital character, exhibits a dramatic dependence on electron correlation. This enables us to estimate the Coulomb repulsion
and Hund's coupling
, and to highlight the role played by
in these peculiar orbital-dependent electron correlation effects. Second, we show that short-range antiferromagnetic correlations, which are a prerequisite to the occurrence of these excitations at the
point, are still present in the superconducting state.
Jarrige, I.; Ishii, Kenji; Yoshida, Masahiro; Fukuda, Tatsuo; Ikeuchi, Kazuhiko*; Ishikado, Motoyuki*; Hiraoka, Nozomu*; Tsuei, K.-D.*; Kito, Hijiri*; Iyo, Akira*; et al.
Physica C, 470(Suppl.1), p.S377 - S378, 2010/10
Times Cited Count:4 Percentile:21.10(Physics, Applied)Jarrige, I.; Cai, Y. Q.*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Bleuzen, A.*
Applied Physics Letters, 93(5), p.054101_1 - 054101_3, 2008/08
Times Cited Count:9 Percentile:35.90(Physics, Applied)Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Taguchi, Munetaka*; Oishi, Yasuo*; Matsumura, Takashi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*
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Ishii, Kenji; Jarrige, I.; Ikeuchi, Kazuhiko; Yoshida, Masahiro; Ishii, Hirofumi*; Hiraoka, Nozomu*; Toyokawa, Hidenori*
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no abstracts in English
Jarrige, I.; Ishii, Kenji; Ikeuchi, Kazuhiko*; Yoshida, Masahiro; Ishikado, Motoyuki; Hiraoka, Nozomu*; Tsuei, K.-D.*; Iyo, Akira*; Eisaki, Hiroshi*; Kito, Hijiri*; et al.
no journal, ,
A prerequisite to elucidate the mechanism underlying superconductivity in the iron oxypnictides is an in-depth knowledge of the low-lying electronic excitations. In an attempt to unveil those low-energy excitations, we have performed a resonant inelastic X-ray scattering (RIXS) measurement at the Fe K edge in a single crystal of the underdoped superconductor compound PrFeAsO (Tc = 42 K). We discern a feature centered around 4 eV which is reminiscent of the metal-ligand charge transfer in the cuprates, therefore we are tempted to ascribe it to the charge transfer between Fe 3d and As 4p.
Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Taguchi, Munetaka*; Oishi, Yasuo*; Matsumura, Takeshi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y. Q.*
no journal, ,
Jarrige, I.; Shieh, S.*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*
no journal, ,
Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Wang, J.*; Matsumura, Takashi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*
no journal, ,
Jarrige, I.; Ishii, Kenji; Fukuda, Tatsuo; Yoshida, Masahiro; Ishikado, Motoyuki; Shamoto, Shinichi; Hiraoka, Nozomu*; Tsuei, K.-D.*
no journal, ,