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Journal Articles

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

 Times Cited Count:36 Percentile:77.65(Materials Science, Multidisciplinary)

Journal Articles

Resonant inelastic X-ray scattering study of intraband charge excitations in hole-doped high-$$T_c$$ cuprates

Wakimoto, Shuichi; Ishii, Kenji; Kimura, Hiroyuki*; Ikeuchi, Kazuhiko*; Yoshida, Masahiro*; Adachi, Tadashi*; Casa, D.*; Fujita, Masaki*; Fukunaga, Yasushi*; Gog, T.*; et al.

Physical Review B, 87(10), p.104511_1 - 104511_7, 2013/03

 Times Cited Count:10 Percentile:40.29(Materials Science, Multidisciplinary)

Journal Articles

Magnetoelectric effect driven by magnetic domain modification in LuFe$$_{2}$$O$$_{4}$$

Kambe, Takashi*; Fukada, Yukimasa*; Kano, Jun*; Nagata, Tomoko*; Okazaki, Hiroyuki*; Yokoya, Takayoshi*; Wakimoto, Shuichi; Kakurai, Kazuhisa; Ikeda, Naoshi*

Physical Review Letters, 110(11), p.117602_1 - 117602_5, 2013/03

 Times Cited Count:26 Percentile:74.62(Physics, Multidisciplinary)

Journal Articles

Research on glass cells for $$^{3}$$He neutron spin filters

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; et al.

Physica B; Condensed Matter, 406(12), p.2443 - 2447, 2011/06

Journal Articles

Research on glass cells for $$^{3}$$He neutron spin filters

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; et al.

Physica B; Condensed Matter, 406(12), p.2443 - 2447, 2011/06

 Times Cited Count:3 Percentile:14.69(Physics, Condensed Matter)

Journal Articles

Characterization of glasses for $$^{3}$$He neutron spin filter cells

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Arai, Masatoshi; Takeda, Masayasu; et al.

Nuclear Instruments and Methods in Physics Research A, 634(1, Suppl.), p.S122 - S125, 2011/04

 Times Cited Count:5 Percentile:35.76(Instruments & Instrumentation)

Journal Articles

Fe-doping effects on magnetism in hole-type superconductors of (Bi,Pb)$$_{2}$$Sr$$_{2}$$CuO$$_{6}$$

Hiraka, Haruhiro*; Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Matsumura, Daiju; Nishihata, Yasuo; Mizuki, Junichiro; Yamada, Kazuyoshi*

Journal of Physics; Conference Series, 200, p.012059_1 - 012059_4, 2010/02

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

We studied Fe-dopant effects on spin correlations in Bi$$_{1.75}$$Pb$$_{0.35}$$Sr$$_{1.90}$$CuO$$_{6+delta'}$$. Magnetic neutron elastic scattering, which is absent in a pristine sample, has been observed at incommensurate positions with an incommensurability of $$delta$$$$sim$$0.2. Surprisingly, this anomalously large $$delta$$ follows a linear relation $$delta$$$$sim$$$$p$$ even in the overdoped region, unlike for La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$. We discuss this specific feature observed in the overdoped phase from a dynamical stripe viewpoint.

Journal Articles

Charge excitations in the stripe-ordered La$$_{5/3}$$Sr$$_{1/3}$$NiO$$_{4}$$ and La$$_{2-x}$$(Ba,Sr)$$_{x}$$CuO$$_{4}$$ superconducting compounds

Wakimoto, Shuichi; Kimura, Hiroyuki*; Ishii, Kenji; Ikeuchi, Kazuhiko; Adachi, Tadashi*; Fujita, Masaki*; Kakurai, Kazuhisa; Koike, Yoji*; Mizuki, Junichiro; Noda, Yukio*; et al.

Physical Review Letters, 102(15), p.157001_1 - 157001_4, 2009/04

 Times Cited Count:25 Percentile:73.54(Physics, Multidisciplinary)

Journal Articles

Ni-impurity effect in high-$$T_c$$ cuprates studied by neutron scattering and XAFS spectroscopy

Hiraka, Haruhiro*; Wakimoto, Shuichi; Matsuda, Masaaki; Matsumura, Daiju; Nishihata, Yasuo; Mizuki, Junichiro; Yamada, Kazuyoshi*

Journal of Physics and Chemistry of Solids, 69(12), p.3136 - 3138, 2008/12

Journal Articles

Ni-impurity effect in high-$$T_c$$ cuprates studied by neutron scattering and XAFS spectroscopy

Hiraka, Haruhiro*; Wakimoto, Shuichi; Matsuda, Masaaki; Matsumura, Daiju; Nishihata, Yasuo; Mizuki, Junichiro; Yamada, Kazuyoshi*

Journal of Physics and Chemistry of Solids, 69(12), p.3136 - 3138, 2008/12

 Times Cited Count:2 Percentile:12.51(Chemistry, Multidisciplinary)

Neutron scattering experiments using La$$_{2-x}$$Sr$$_{x}$$Cu$$_{1-y}$$Ni$$_{y}$$O$$_{4}$$ clarified that the parallel spin-density modulations (SDMs) in the superconducting phase are susceptible to Ni, in the same way as the diagonal SDMs in the insulating spin-glass phase. Ni substitution reduces the mobile hole concentration from $$x$$ down to $$x$$ - $$y$$. Polarized XAFS measurements using Ni $$K$$-edge probe two types of Ni valence states; Ni$$^{2+}$$ and Ni$$^{2+alpha}$$. It indicates that a strong hole localization occurs around Ni, resulting in an effective spin-$$frac{1}{2}$$ value at Ni sites. Therefore, a charge impurity nature of Ni is most likely realized when $$x$$ $$ge$$ $$y$$.

JAEA Reports

Remote handling demonstration test facility for spallation target

Kaminaga, Masanori; Sasaki, Shinobu; Haga, Katsuhiro; Aso, Tomokazu; Kinoshita, Hidetaka; Kogawa, Hiroyuki; Akimoto, Atsushi*; Adachi, Junichi*; Hino, Ryutaro

JAERI-Tech 2000-060, 37 Pages, 2000/11

JAERI-Tech-2000-060.pdf:5.54MB

no abstracts in English

Journal Articles

An Investigation of steel plate-cast iron hybrid casting process for recycling of low level radioactive metal waste

Nakamura, Hisashi; Hirabayashi, Takakuni; Akimoto, Jun*; Takahashi, Kenji*; Shindo, Hideaki; Sakurai, Daihachiro*; Almansour, A.*; Okane, Toshimitsu*; Umeda, Takateru*

Materials Science Forum, 329-330, p.441 - 448, 2000/00

no abstracts in English

Journal Articles

Steel plate-cast iron hybrid casting with steel shot mold

Nakamura, Hisashi; Hirabayashi, Takakuni; Akimoto, Jun*; Takahashi, Kenji*; Shindo, Hideaki*; Sakurai, Daihachiro*; Almansour, A.*; Okane, Toshimitsu*; Umeda, Takateru*

Proceedings Modeling of Casting & Solidification Processes 4, 1999, p.437 - 445, 1999/09

no abstracts in English

Journal Articles

An Investigation of steel plate-cast iron hybrid casting process for recycling of low level radioactive metal waste

Nakamura, Hisashi; Hirabayashi, Takakuni; Akimoto, Jun*; Takahashi, Kenji*; Shindo, Hideaki*; Sakurai, Daihachiro*; Almansour, A.*; Okane, Toshimitsu*; Umeda, Takateru*

Int. J.Cast Metals Res., 11(5), p.339 - 343, 1999/00

 Times Cited Count:0 Percentile:0.00(Metallurgy & Metallurgical Engineering)

no abstracts in English

Oral presentation

New utilization application system at JRR-3; Research Information NaviGator (RING)

Wakimoto, Shuichi; Endo, Hitoshi; Yasuda, Ryo; Kawakami, Jun

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering study of stripe-ordered La$$_{2-x}$$Sr$$_{x}$$NiO$$_{4}$$ and La$$_{2-x}$$Ba$$_{x}$$CuO$$_{4}$$

Wakimoto, Shuichi; Ishii, Kenji; Ikeuchi, Kazuhiko; Kakurai, Kazuhisa; Mizuki, Junichiro; Kimura, Hiroyuki*; Noda, Yukio*; Adachi, Tadashi*; Koike, Yoji*; Fujita, Masaki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering study of stripe-ordered La$$_{5/3}$$Sr$$_{1/3}$$NiO$$_{4}$$ at the Ni-K Edge

Wakimoto, Shuichi; Ishii, Kenji; Kimura, Hiroyuki*; Ikeuchi, Kazuhiko; Mizuki, Junichiro; Yamada, Kazuyoshi*; Shvyd'ko, Y.*

no journal, , 

It is known that the in-gap band appears when charge carriers are doped into the charge-transfer-type Mott insulators. A possible origin of the in-gap band has been proposed by Homes et al. on the basis of the charge stripes which have been comprehensively studied by neutron scattering. Motivated by this proposal, we have performed a resonant inelastic X-ray scattering experiment at the Ni-K edge on La$$_{5/3}$$Sr$$_{1/3}$$NiO$$_{4}$$ where a robust charge stripe order has been characterized. In this talk, we will report the results of this experiment showing that an additional charge excitation appears at the momentum transfer corresponding to the charge stripe spacing.

Oral presentation

Effect of oxidative DNA damage on radiation-induced mutagenesis in ${it Arabidopsis thaliana}$

Yoshihara, Ryohei; Hase, Yoshihiro; Nozawa, Shigeki; Narumi, Issei; Takimoto, Koichi*; Hidema, Jun*; Sakamoto, Ayako

no journal, , 

We analyzed $$gamma$$-ray-induced mutation spectrum in Arabidopsis seedling to investigate the effect of oxidative DNA damage on mutagenesis. Moreover, to evaluate the effect of nucleotide pool sanitization system on $$gamma$$-ray-induced mutations, we analyzed a mutant deficient in the Arabidopsis ${it NUDT1}$ gene that is a homologue of ${it mutT}$. The $$gamma$$-ray sensitivity of the ${it NUDT1}$ mutant was slightly higher, but not statistically significant, than that of wild type plant. However, the mutation spectra induced by $$gamma$$-rays were different between the wild type and ${it NUDT1}$ plants. From these results, it was suggested that the ${it NUDT1}$ deficiency obviously affects on the mutagenesis but not the plant growth following $$gamma$$-irradiation.

Oral presentation

Cu-K edge RIXS study of charge excitations in La$$_{2-x}$$(Sr,Ba)$$_{x}$$CuO$$_{4}$$

Wakimoto, Shuichi; Ishii, Kenji; Kimura, Hiroyuki*; Ikeuchi, Kazuhiko*; Yoshida, Masahiro*; Adachi, Tadashi*; Koike, Yoji*; Fujita, Masaki*; Yamada, Kazuyoshi*; Mizuki, Junichiro

no journal, , 

We performed resonant inelastic X-ray scattering at Cu-K absorption edge to study charge excitations in hole-doped high-Tc cuprate La$$_{2-x}$$(Sr,Ba)$$_{x}$$CuO$$_{4}$$. By subtracting elastic and molecular orbital excitation components from RIXS spectra, we have found dispersing charge excitation below 4 eV. This is the first success of observation of intra-band excitation which reflects dynamical charge-charge correlation function in the hole-doped system.

Oral presentation

Utilization of JRR-3 and JRR-3 users office

Wakimoto, Shuichi; Harayama, Sayaka; Kakurai, Kazuhisa; Kawakami, Jun; Matsubayashi, Masahito; Matsue, Hideaki; Takahashi, Hiroyuki; Utsumi, Wataru

no journal, , 

26 (Records 1-20 displayed on this page)