JOPSS - Search Results

Journal Articles

Distinct variation of electronic states due to annealing in -type La $_{1.8}$ Eu $_{0.2}$ CuO $_{4}$ and Nd $_{2}$ CuO $_{4}$

Asano, Shun*; Ishii, Kenji*; Matsumura, Daiju; Tsuji, Takuya; Kudo, Kota*; Taniguchi, Takanori*; Saito, Shin*; Sunohara, Toshiki*; Kawamata, Takayuki*; Koike, Yoji*; et al.

Physical Review B, 104(21), p.214504_1 - 214504_7, 2021/12

https://doi.org/10.1103/PhysRevB.104.214504

Times Cited Count：1 Percentile：0(Materials Science, Multidisciplinary)

Journal Articles

Hybridization of Bogoliubov quasiparticles between adjacent CuO layers in the triple-layer cuprate BiSrCaCuO $_{10+delta}$ studied by angle-resolved photoemission spectroscopy

Ideta, Shinichiro*; Johnston, S.*; Yoshida, Teppei*; Tanaka, Kiyohisa*; Mori, Michiyasu; Anzai, Hiroaki*; Ino, Akihiro*; Arita, Masashi*; Namatame, Hirofumi*; Taniguchi, Masaki*; et al.

Physical Review Letters, 127(21), p.217004_1 - 217004_6, 2021/11

https://doi.org/10.1103/PhysRevLett.127.217004

Times Cited Count：6 Percentile：60.19(Physics, Multidisciplinary)

Journal Articles

New findings by looking back

Shamoto, Shinichi

Koon Chodendo No Wakaki Samuraitachi; Nihonjin Kenkyusha No Chosen To Funto No Kiroku, p.105 - 121, 2019/12

no abstracts in English

Journal Articles

Ce substitution and reduction annealing effects on electronic states in Pr $_{2-x}$ CeCuO studied by Cu -edge X-ray absorption spectroscopy

Asano, Shun*; Ishii, Kenji*; Matsumura, Daiju; Tsuji, Takuya; Ina, Toshiaki*; Suzuki, Kensuke*; Fujita, Masaki*

Journal of the Physical Society of Japan, 87(9), p.094710_1 - 094710_5, 2018/09

https://doi.org/10.7566/JPSJ.87.094710

Times Cited Count：13 Percentile：64.6(Physics, Multidisciplinary)

Journal Articles

Reduction and oxidation annealing effects on Cu -edge XAFS for electron-doped cuprate superconductors

Asano, Shun*; Suzuki, Kensuke*; Matsumura, Daiju; Ishii, Kenji*; Ina, Toshiaki*; Fujita, Masaki*

Journal of Physics; Conference Series, 969, p.012051_1 - 012051_5, 2018/04

https://doi.org/10.1088/1742-6596/969/1/012051

Times Cited Count：3 Percentile：81.88(Physics, Applied)

Journal Articles

Observation of momentum-dependent charge excitations in hole-doped cuprates using resonant inelastic X-ray scattering at the oxygen edge

Ishii, Kenji*; Toyama, Takami*; Asano, Shun*; Sato, Kentaro*; Fujita, Masaki*; Wakimoto, Shuichi; Tsutsui, Kenji*; Sota, Shigetoshi*; Miyawaki, Jun*; Niwa, Hideharu*; et al.

Physical Review B, 96(11), p.115148_1 - 115148_8, 2017/09

AA2017-0402.pdf:0.81MB

https://doi.org/10.1103/PhysRevB.96.115148

Times Cited Count：29 Percentile：77.61(Materials Science, Multidisciplinary)

Journal Articles

Momentum dependence of Mott gap excitations in optimally doped YBaCuO $_{7-delta}$ studied by resonant inelastic X-ray scattering

Ishii, 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

https://doi.org/10.1063/1.2354776

Mott gap excitations in the optimally doped high- $T_{c}$ superconductor YBaCuO $_{7-delta}$ ( $T_{c}$ = 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 $b^{*}$ 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.

Journal Articles

Doping Momentum dependence of charge dynamics in Nd $_{2-x}$ Ce $_{x}$ CuO (x=0, 0.075, and 0.15) studied by Resonant inelastic X-ray scattering

Ishii, 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

https://doi.org/10.1063/1.2354756

We report a resonant inelastic X-ray scattering (RIXS) study of charge excitations in the electron-doped high- $T_{c}$ superconductor Nd $_{1.85}$ Ce $_{0.15}$ 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.

Journal Articles

Magnetic properties of the overdoped superconductor La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ with and without Zn impurities

Wakimoto, Shuichi; Birgeneau, R. J.*; Kagedan, A.*; Kim, H.-K.*; Swainson, I.*; Yamada, Kazuyoshi*; Zhang, H.*

Physical Review B, 72(6), p.064521_1 - 064521_9, 2005/08

https://doi.org/10.1103/PhysRevB.72.064521

Times Cited Count：29 Percentile：71.81(Materials Science, Multidisciplinary)

The magnetic properties of the Zn-substituted overdoped high- superconductor La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ (LSCO) have been studied by magnetization measurements and neutron scattering. Magnetization measurements reveal that for Zn-free samples with a Curie term is induced implying the existence of local paramagnetic moments. A comparison of the Curie behaviour between Zn-doped and Zn-free samples signifies a general competitive relationship between the superconductivity and the induced paramagnetic moment. Neutron scattering measurements show that Zn-substitution in overdoped LSCO anomalously enhances the inelastic magnetic scattering spectra around the position, peaking at meV. These facts are discussed on the basis of a "swiss-cheese" model of Zn-substituted systems as well as a microscopic phase separation scenario in the overdoped region indicated by muon-spin-relaxation measurements.

Journal Articles

Field-induced transition between magnetically disordered and ordered phases in underdoped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$

Khaykovich, B.*; Wakimoto, Shuichi; Birgeneau, R. J.*; Kastner, M. A.*; Lee, Y. S.*; Smeibidle, P.*; Vorderwisch, P.*; Yamada, Kazuyoshi*

Physical Review B, 71(22), p.220508_1 - 220508_4, 2005/06

https://doi.org/10.1103/PhysRevB.71.220508

Times Cited Count：74 Percentile：89.81(Materials Science, Multidisciplinary)

Magnetic field-induced transition between magnetically disordered and ordered phases in slightly under-doped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ with has been observed. Static incommensurate spin-density-wave order is induced above a critical field of about 3 T, as measured by elastic neutron scattering. These results are consistent with recently developed quantum phase transition scenario.

Journal Articles

Momentum dependence of charge excitations in the electron-doped superconductor Nd $_{1.85}$ Ce $_{0.15}$ CuO; A Resonant inelastic X-ray scattering study

Ishii, 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

https://doi.org/10.1103/PhysRevLett.94.207003

Times Cited Count：72 Percentile：89.18(Physics, Multidisciplinary)

We report a resonant inelastic X-ray scattering (RIXS) study of charge excitations in the electron-doped high- $T_{c}$ superconductor Nd $_{1.85}$ Ce $_{0.15}$ 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.

Journal Articles

Mott gap excitations in twin-free YBaCuO $_{7-delta}$ ( $T_{c}$ = 93 K) studied by resonant inelastic X-ray scattering

Ishii, 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

https://doi.org/10.1103/PhysRevLett.94.187002

Times Cited Count：40 Percentile：80.87(Physics, Multidisciplinary)

Mott gap excitations in the optimally doped high- $T_{c}$ superconductor YBaCuO $_{7-delta}$ ( $T_{c}$ = 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 $b^{*}$ 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.

Journal Articles

Electronic structure of a half vortex

Machida, Masahiko; Koyama, Tomio*; Kato, Masaru*; Ishida, Takekazu*

Physica C, 412-414(Part 1), p.367 - 371, 2004/10

https://doi.org/10.1016/j.physc.2004.01.057

Times Cited Count：4 Percentile：25.1(Physics, Applied)

no abstracts in English

Journal Articles

Unified theory for magnetic and electric field coupling in multistacked Josephson junctions

Machida, Masahiko; Sakai, Shigeki*

Physical Review B, 70(14), p.144520_1 - 144520_6, 2004/10

https://doi.org/10.1103/PhysRevB.70.144520

Times Cited Count：33 Percentile：77.86(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Static spin correlations in lightly-doped LaCuO $_{4+delta}$

Matsuda, Masaaki; Fujita, Masaki*; Yamada, Kazuyoshi*

Physica C, 408-410, p.810 - 811, 2004/08

https://doi.org/10.1016/j.physc.2004.03.140

Times Cited Count：0 Percentile：0(Physics, Applied)

Neutron scattering experiments have been performed in lightly-doped LaCuO $_{4+delta}$ in order to study coexistence of a three-dimensional antiferromagnetic (AF) long-range ordered phase and a spin-glass (SG) phase in a very lightly-doped region. Although we studied in a limited range of hole concentration, where Nel temperature is between 270 K and 320 K, no sign of the SG phase was observed, suggesting that there may exist a threshold to realize the phase separation into the AF and SG phases.

Journal Articles

Localized rotating-modes in capacitively coupled intrinsic Josephson junctions; Systematic study of branching structure and collective dynamical instability

Machida, Masahiko; Koyama, Tomio*

Physical Review B, 70(2), p.024523_1 - 024523_6, 2004/07

https://doi.org/10.1103/PhysRevB.70.024523

Times Cited Count：64 Percentile：89.35(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Static antiferromagnetic correlations under magnetic fields in electron-doped high- $_{c}$ cuprate superconductor Pr $_{0.89}$ LaCe $_{0.11}$ CuO $_{4}$

Fujita, Masaki*; Matsuda, Masaaki; Katano, Susumu; Yamada, Kazuyoshi*

Physica B; Condensed Matter, 345(1-4), p.19 - 22, 2004/03

https://doi.org/10.1016/j.physb.2003.11.011

Times Cited Count：1 Percentile：7.1(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Direct numerical simulations for local superconductivity above upper critical field; Theoretical confirmation of stable precursors

Machida, Masahiko; Itakura, Mitsuhiro

Physica C, 392-396(1-4), p.331 - 335, 2003/10

no abstracts in English

Journal Articles

Phase diagram and dynamical matching of Josephson vortices in mesoscopic layered high-Tc superconductors

Machida, Masahiko

Physica C, 388-389, p.679 - 680, 2003/05

https://doi.org/10.1016/S0921-4534(02)02456-5

Times Cited Count：0 Percentile：0(Physics, Applied)

no abstracts in English

Journal Articles

Vibronic mechanism of high- superconductivity

Tachiki, Masashi*; Machida, Masahiko; Egami, Takeshi*

Physical Review B, 67(17), p.174506_1 - 174506_12, 2003/05

https://doi.org/10.1103/PhysRevB.67.174506

Times Cited Count：47 Percentile：85.19(Materials Science, Multidisciplinary)

no abstracts in English

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Distinct variation of electronic states due to annealing in -type La $_{1.8}$ Eu $_{0.2}$ CuO $_{4}$ and Nd $_{2}$ CuO $_{4}$

Hybridization of Bogoliubov quasiparticles between adjacent CuO layers in the triple-layer cuprate BiSrCaCuO $_{10+delta}$ studied by angle-resolved photoemission spectroscopy

New findings by looking back

Ce substitution and reduction annealing effects on electronic states in Pr $_{2-x}$ CeCuO studied by Cu -edge X-ray absorption spectroscopy

Reduction and oxidation annealing effects on Cu -edge XAFS for electron-doped cuprate superconductors

Observation of momentum-dependent charge excitations in hole-doped cuprates using resonant inelastic X-ray scattering at the oxygen edge

Momentum dependence of Mott gap excitations in optimally doped YBaCuO $_{7-delta}$ studied by resonant inelastic X-ray scattering

Doping Momentum dependence of charge dynamics in Nd $_{2-x}$ Ce $_{x}$ CuO (x=0, 0.075, and 0.15) studied by Resonant inelastic X-ray scattering

Magnetic properties of the overdoped superconductor La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ with and without Zn impurities

Field-induced transition between magnetically disordered and ordered phases in underdoped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$

Momentum dependence of charge excitations in the electron-doped superconductor Nd $_{1.85}$ Ce $_{0.15}$ CuO; A Resonant inelastic X-ray scattering study

Mott gap excitations in twin-free YBaCuO $_{7-delta}$ ( $T_{c}$ = 93 K) studied by resonant inelastic X-ray scattering

Electronic structure of a half vortex

Unified theory for magnetic and electric field coupling in multistacked Josephson junctions

Static spin correlations in lightly-doped LaCuO $_{4+delta}$

Localized rotating-modes in capacitively coupled intrinsic Josephson junctions; Systematic study of branching structure and collective dynamical instability

Static antiferromagnetic correlations under magnetic fields in electron-doped high- $_{c}$ cuprate superconductor Pr $_{0.89}$ LaCe $_{0.11}$ CuO $_{4}$

Direct numerical simulations for local superconductivity above upper critical field; Theoretical confirmation of stable precursors

Phase diagram and dynamical matching of Josephson vortices in mesoscopic layered high-Tc superconductors

Vibronic mechanism of high- superconductivity