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Tajima, Hiroyuki*; Oue, Daigo*; Matsuo, Mamoru
Physical Review A, 106(3), p.033310_1 - 033310_8, 2022/09
Times Cited Count：3 Percentile：23.32(Optics)Nakajima, Kenji; Kajimoto, Ryoichi
Physica B; Condensed Matter, 551, p.142 - 145, 2018/12
Times Cited Count：0 Percentile：0(Physics, Condensed Matter)
RuO
Josephson junctionsKaneyasu, Hirono*; Etter, S. B.*; Sakai, Toru; Sigrist, M.*
Physical Review B, 92(13), p.134515_1 - 134515_5, 2015/10
Times Cited Count：4 Percentile：14.69(Materials Science, Multidisciplinary)The evolution of the 3-Kelvin superconductivity phase at the interface between SrRuO and Ru-metal inclusions is discussed for Pb-Ru-SrRuO contacts. Using the Ginzburg-Landau model, the influence of proximity-induced superconductivity in Ru on the topology of the 3-K phase is analysed. Because the s-wave order parameter in Ru favors a 3-K state of trivial topology, the onset temperature of the phase with a nontrivial topology is essentially reduced to the bulk transition temperature.
Cu
O
studied by resonant inelastic X-ray scatteringIshii, Kenji; Tsutsui, Kenji*; Endo, Yasuo*; Toyama, Takami*; Kuzushita, Kaori; Inami, Toshiya; Owada, Kenji; Maekawa, Sadamichi*; Masui, Takahiko*; Tajima, Setsuko*; et al.
AIP Conference Proceedings 850, p.445 - 446, 2006/09
Mott gap excitations in the optimally doped high-
superconductor YBaCuO ( = 93 K) have been studied by the resonant inelastic X-ray scattering method. Anisotropic spectra in the 
-plane are observed in a twin-free crystal. The excitation from the one-dimensional CuO chain is enhanced at 2 eV near the zone boundary of the 
direction, while the excitation from the CuO plane is broad at 1.5-4 eV and almost independent of the momentum transfer. Theoretical calculation based on the one-dimensional and two-dimensional Hubbard model reproduces the observed spectra when different values of the on-site Coulomb energy are assumed. The Mott gap of the CuO chain site is found to be much smaller than that of the CuO plane site.
Ce
CuO
(x=0, 0.075, and 0.15) studied by Resonant inelastic X-ray scatteringIshii, Kenji; Tsutsui, Kenji*; Endo, Yasuo*; Toyama, Takami*; Maekawa, Sadamichi*; Hoesch, M.; Kuzushita, Kaori; Inami, Toshiya; Tsubota, Masami; Yamada, Kazuyoshi*; et al.
AIP Conference Proceedings 850, p.403 - 404, 2006/09
We report a resonant inelastic X-ray scattering (RIXS) study of charge excitations in the electron-doped high- superconductor Nd
Ce
CuO. The intraband and interband excitations across the Fermi energy are separated for the first time by tuning the experimental conditions properly to measure charge excitations at low energy. A dispersion relation with 
-dependent width emerges clearly in the intraband excitation, while the intensity of the interband excitation is concentrated around 2 eV near the zone center. The experimental results are consistent with theoretical calculation of the RIXS spectra based on the Hubbard model.
SrMnO
studied by resonant inelastic X-ray scatteringIshii, Kenji; Inami, Toshiya; Owada, Kenji; Kuzushita, Kaori; Mizuki, Junichiro; Murakami, Yoichi; Ishihara, Sumio*; Endo, Yasuo*; Maekawa, Sadamichi*; Hirota, Kazuma*; et al.
Journal of Physics and Chemistry of Solids, 66(12), p.2157 - 2162, 2005/12
Times Cited Count：0 Percentile：0(Chemistry, Multidisciplinary)We have studied electronic excitations of hole-doped manganese oxides LaSr
MnO (
and 
) by resonant inelastic X-ray scattering at Mn K absorption edge. We observed in the excitation spectra that the Mott gap of La
Sr
MnO was filled by hole-doping. In La
Sr
MnO, which shows a metal-insulator transition, we found that temperature dependence of scattering intensity is different between two scattering vectors. It may reflects a anisotropic electronic structure which originates from the orbital degrees of freedom in manganese oxides.
CeCuO; A Resonant inelastic X-ray scattering studyIshii, Kenji; Tsutsui, Kenji*; Endo, Yasuo*; Toyama, Takami*; Maekawa, Sadamichi*; Hoesch, M.; Kuzushita, Kaori; Tsubota, Masami; Inami, Toshiya; Mizuki, Junichiro; et al.
Physical Review Letters, 94(20), p.207003_1 - 207003_4, 2005/05
Times Cited Count：72 Percentile：89.21(Physics, Multidisciplinary)We report a resonant inelastic X-ray scattering (RIXS) study of charge excitations in the electron-doped high- superconductor NdCeCuO. The intraband and interband excitations across the Fermi energy are separated for the first time by tuning the experimental conditions properly to measure charge excitations at low energy. A dispersion relation with -dependent width emerges clearly in the intraband excitation, while the intensity of the interband excitation is concentrated around 2 eV near the zone center. The experimental results are consistent with theoretical calculation of the RIXS spectra based on the Hubbard model.
CuO ( = 93 K) studied by resonant inelastic X-ray scatteringIshii, Kenji; Tsutsui, Kenji*; Endo, Yasuo*; Toyama, Takami*; Kuzushita, Kaori; Inami, Toshiya; Owada, Kenji; Maekawa, Sadamichi*; Masui, Takahiko*; Tajima, Setsuko*; et al.
Physical Review Letters, 94(18), p.187002_1 - 187002_4, 2005/05
Times Cited Count：40 Percentile：80.93(Physics, Multidisciplinary)Mott gap excitations in the optimally doped high- superconductor YBaCuO ( = 93 K) have been studied by the resonant inelastic X-ray scattering method. Anisotropic spectra in the -plane are observed in a twin-free crystal. The excitation from the one-dimensional CuO chain is enhanced at 2 eV near the zone boundary of the direction, while the excitation from the CuO plane is broad at 1.5-4 eV and almost independent of the momentum transfer. Theoretical calculation based on the one-dimensional and two-dimensional Hubbard model reproduces the observed spectra when different values of the on-site Coulomb energy are assumed. The Mott gap of the CuO chain site is found to be much smaller than that of the CuO plane site.
Yamada, Susumu; Imamura, Toshiyuki*; Machida, Masahiko
Proceedings of 23rd IASTED International Multi-Conference on Parallel and Distributed Computing and Networks (PDCN 2005), p.638 - 643, 2005/02
no abstracts in English
SrMnO (, )Ishii, Kenji; Inami, Toshiya; Owada, Kenji; Kuzushita, Kaori; Mizuki, Junichiro; Murakami, Yoichi; Ishihara, Sumio*; Endo, Yasuo*; Maekawa, Sadamichi*; Hirota, Kazuma*; et al.
Physical Review B, 70(22), p.224437_1 - 224437_6, 2004/12
Times Cited Count：19 Percentile：64.32(Materials Science, Multidisciplinary)Electronic excitations in the hole doped manganese oxides (LaSrMnO, and ) have been elucidated by using the resonant inelastic X-ray scattering (RIXS) method. A doping effect in the strongly correlated electron systems has been observed for the first time. The scattering spectra show that a salient peak appears in low energies indicating the persistence of the Mott gap. At the same time, the energy gap is partly filled by doping holes and the spectral weight energy shifts toward lower energies. The excitation spectra show little change in the momentum space as is in undoped LaMnO. On the other hand, the scattering intensities in the low energy excitations of are anisotropic in temperature dependence, which indicates an anisotropy of magnetic interaction and underlying effect of the orbital.
Yamada, Susumu; Machida, Masahiko; Imamura, Toshiyuki*
Joho Shori Gakkai Rombunshi; Komputeingu Shisutemu (Internet), 45(SIG6(ACS6)), p.161 - 170, 2004/05
no abstracts in English
Yamada, Susumu; Machida, Masahiko; Imamura, Toshiyuki*
Hai Pafomansu Komputingu To Keisan Kagaku Shimpojium (HPCS 2004) Rombunshu, p.103 - 110, 2004/01
no abstracts in English
Katano, Susumu; Minakawa, Nobuaki; Metoki, Naoto; Osakabe, Toyotaka; Suzuki, Junichi; Koike, Yoshihiro; Ishii, Yoshinobu
Applied Physics A, 74(Suppl.1), p.S270 - S272, 2002/12
Times Cited Count：14 Percentile：50.42(Materials Science, Multidisciplinary)no abstracts in English
SiMatsuda, Tatsuma; Haga, Yoshinori; Tokiwa, Yoshifumi; Yamamoto, Etsuji; Ikeda, Shugo; Okubo, Tomoyuki*; Yamada, Mineko*; Nakamura, Akio; Onuki, Yoshichika
Journal of Nuclear Science and Technology, 39(Suppl.3), p.225 - 228, 2002/11
no abstracts in English
Br]BrFujimori, Shinichi; Ino, Akihiro; Okane, Tetsuo; Fujimori, Atsushi; Okada, Kozo*; Manabe, Toshio*; Yamashita, Masahiro*; Kishida, Hideo*; Okamoto, Hiroshi*
Surface Review and Letters, 9(2), p.1065 - 1069, 2002/04
Times Cited Count：0 Percentile：0(Chemistry, Physical)no abstracts in English
Sekiyama, Akira*; Iwasaki, T.*; Matsuda, K.*; Saito, Yuji; Onuki, Yoshichika*; Suga, Shigemasa*
Nature, 403(6768), p.396 - 398, 2000/01
Times Cited Count：255 Percentile：98.93(Multidisciplinary Sciences)no abstracts in English
Ishii, Yoshinobu; Suzuki, Junichi; Fujiwara, Satoru
JAERI-Review 97-012, 107 Pages, 1997/10
JAERI-Review-97-012.pdf:4.77MB
no abstracts in English
Osakabe, Toyotaka; Kato, Yoshihiro*; Honmoto, Satoru*; Kuwahara, Keitaro*
no journal, ,
no abstracts in English
Haga, Yoshinori
no journal, ,
Osakabe, Toyotaka; Kuwahara, Keitaro*; Honmoto, Satoru*; Kato, Yoshihiro*
no journal, ,
no abstracts in English
