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Journal Articles

Momentum-resolved resonant inelastic X-ray scattering on a single crystal under high pressure

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:22.1(Instruments & Instrumentation)

Journal Articles

Resonant inelastic X-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO$$_{1-y}$$

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:38.69(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$$_{0.7}$$ and PrFeAsO respectively, with two main results. First, using calculations based on a 16 band $$dp$$ model, we show that the energy of the lowest-lying excitations, identified as $$dd$$ interband transitions of dominant $$xz$$, $$yz$$ orbital character, exhibits a dramatic dependence on electron correlation. This enables us to estimate the Coulomb repulsion $$U$$ and Hund's coupling $$J$$, and to highlight the role played by $$J$$ 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 $$Gamma$$ point, are still present in the superconducting state.

Journal Articles

Resonant inelastic X-ray scattering in single-crystal superconducting PrFeAsO$$_{0.7}$$

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:23.57(Physics, Applied)

Journal Articles

Thermally activated charge transfer in a Prussian blue derivative probed by resonant inelastic X-ray scattering

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:38.53(Physics, Applied)

Oral presentation

Volume collapse transition in TmTe; Competition between strong correlation and $$f$$-$$d$$ hybridization at high pressure

Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Taguchi, Munetaka*; Oishi, Yasuo*; Matsumura, Takashi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*

no journal, , 

Oral presentation

Volume collapse transition in TmTe; Competition between strong correlation and f-d hybridization at high pressure

Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Wang, J.*; Matsumura, Takashi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*

no journal, , 

Oral presentation

Pressure-induced metal to insulator transition in LaMnO$$_{3}$$ from X-ray absorption and emission spectroscopies

Jarrige, I.; Shieh, S.*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y.*

no journal, , 

Oral presentation

Resonant inelastic X-ray scattering in higher energy resolution and higher efficiency by using two-dimensional detector

Ishii, Kenji; Jarrige, I.; Ikeuchi, Kazuhiko; Yoshida, Masahiro; Ishii, Hirofumi*; Hiraoka, Nozomu*; Toyokawa, Hidenori*

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering in single-crystal superconducting PrFeAsO$$_{0.7}$$

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$$_{0.7}$$ (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.

Oral presentation

Single-channel vs multi-channel Kondo effects; SmTe and TmTe studied via resonant inelastic X-ray scattering under high pressure

Jarrige, I.; Rueff, J.-P.*; Shieh, S.*; Taguchi, Munetaka*; Oishi, Yasuo*; Matsumura, Takeshi*; Ishii, Hirofumi*; Hiraoka, Nozomu*; Cai, Y. Q.*

no journal, , 

Oral presentation

Resonant inelastic X-ray scattering in single-crystal superconducting PrFeAsO$$_{0.7}$$

Jarrige, I.; Ishii, Kenji; Fukuda, Tatsuo; Yoshida, Masahiro; Ishikado, Motoyuki; Shamoto, Shinichi; Hiraoka, Nozomu*; Tsuei, K.-D.*

no journal, , 

11 (Records 1-11 displayed on this page)
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