論文 - 久我 健太郎
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Electronic structure of silver chalcogenides investigated by hard x-ray photoemission spectroscopy and density functional theory calculations
Sato, K; Hirata, K; Singh, S; Kuga, K; Ogawa, F; Matsunami, M; Takeuchi, T
JOURNAL OF APPLIED PHYSICS 132 ( 4 ) 2022年07月
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Pressure-induced changes of valence fluctuation in β-YbAlB<sub>4</sub> probed by x-ray
Sakaguchi, Y; Ikeda, S; Kawamura, N; Mizumaki, M; Kuga, K; Suzuki, S; Sone, K; Nakatsuji, S; Kobayashi, H
PHYSICAL REVIEW B 105 ( 15 ) 2022年04月
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Synergetic Enhancement of the Power Factor and Suppression of Lattice Thermal Conductivity via Electronic Structure Modification and Nanostructuring on a Ni- and B-Codoped <i>p</i>-Type Si-Ge Alloy for Thermoelectric Application
Muthusamy, O; Singh, S; Hirata, K; Kuga, K; Harish, SK; Shimomura, M; Adachi, M; Yamamoto, Y; Matsunami, M; Takeuchi, T
ACS APPLIED ELECTRONIC MATERIALS 3 ( 12 ) 5621 - 5631 2021年12月
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High-temperature antiferromagnetism in Yb based heavy fermion systems proximate to a Kondo insulator
Suzuki, S; Takubo, K; Kuga, K; Higemoto, W; Ito, TU; Tomita, T; Shimura, Y; Matsumoto, Y; Bareille, C; Wadati, H; Shin, S; Nakatsuji, S
PHYSICAL REVIEW RESEARCH 3 ( 2 ) 2021年05月
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Strong in-plane anisotropy in the electronic structure of fixed-valence β-LuAlB<sub>4</sub>
Reiss, P; Baglo, J; Tan, HE; Chen, XY; Friedemann, S; Kuga, K; Grosche, FM; Nakatsuji, S; Sutherland, M
PHYSICAL REVIEW B 102 ( 8 ) 2020年08月
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Ground State Local 4f Symmetry of CeAgSb2 Probed by Linearly Polarized Hard X-ray Photoemission
H. Fujiwara, Y. Kondo, S. Hamamoto, Y. Kanai-Nakata, K. Kuga, A. Yamasaki, A. Higashiya, T. Kadono, S. Imada, T. Kiss, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, T. Ebihara, A. Sekiyama
Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019) 2020年03月
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Observation of Electronic Structures in Sr-Based Iridates by Bulk-Sensitive Photoemission Spectroscopy
Koya Nakagawa, Hidenori Fujiwara, Satoru Hamamoto, Sho Miyazaki, Yasuhiro Nakatani, Kentaro Kuga, Atsushi Higashiya, Toshiharu Kadono, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Takayuki Muro, Shin Imada, Akira Sekiyama, Kouichi Takase, Hiromi Kobori, Atsushi Yamasaki
Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019) 30 011146-1 - 6 2020年03月
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Local 4f Electronic Structure in PrAg2In Studied by Polarized X-Ray Absorption and Photoemission Spectroscopy
Satoru Hamamoto, Shuhei Fujioka, Yuina Kanai-Nakata, Kohei Yamagami, Kentaro Kuga, Hidenori Fujiwara, Takayuki Kiss, Hiroyuki S. Suzuki, Atsushi Higashiya, Atsushi Yamasaki, Shin Imada, Arata Tanaka, Yukiharu Takeda, Yuji Saitoh, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Akira Sekiyama
Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019) 30 011113-1 - 5 2020年03月
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Linearly Polarized Hard X-Ray Photoemission Spectroscopy of PrBe13
Satoru Hamamoto, Yuina Kanai-Nakata, Hidenori Fujiwara, Kentaro Kuga, Takayuki Kiss, Atsushi Higashiya, Atsushi Yamasaki, Shin Imada, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Akira Sekiyama
Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena 29 012010-1 - 6 2020年02月
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Linear polarization-dependent core-level photoemission spectroscopy in Yb-based valence fluctuating system
Kuga, K; Kanai, Y; Fujiwara, H; Yamagami, K; Hamamoto, S; Aoyama, Y; Sekiyama, A; Higashiya, A; Kadono, T; Imada, S; Yamasaki, A; Tamasaku, K; Yabashi, M; Ishikawa, T; Nakatsuji, S; Kiss, T
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 238 146889-1 - 4 2020年01月
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Observation of the 4<i>f</i> ground-state symmetry in strongly correlated cubic Pr compounds probed by linearly polarized 3<i>d</i> core-level photoemission spectroscopy
Hamamoto, S; Kanai, Y; Fujioka, S; Nakatani, Y; Fujiwara, H; Kuga, K; Kiss, T; Higashiya, A; Yamasaki, A; Imada, S; Tanaka, A; Tamasaku, K; Yabashi, M; Ishikawa, T; Hidaka, H; Yanagisawa, T; Amitsuka, H; Matsumoto, KT; Onimaru, T; Takabatake, T; Sekiyama, A
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 238 146885-1 - 4 2020年01月
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CePd<sub>3</sub>と関連物質における熱電特性と電子構造の研究
尾川 史武, 久我 健太郎, 平田 圭介, 松波 雅治, 竹内 恒博
日本物理学会講演概要集 75.1 ( 0 ) 1904 - 1904 2020年
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Revising the 4<i>f</i> symmetry in CeCu<sub>2</sub>Ge<sub>2</sub>: Soft x-ray absorption and hard x-ray photoemission spectroscopy
Aratani, H; Nakatani, Y; Fujiwara, H; Kawada, M; Kanai, Y; Yamagami, K; Fujioka, S; Hamamoto, S; Kuga, K; Kiss, T; Yamasaki, A; Higashiya, A; Kadono, T; Imada, S; Tanaka, A; Tamasaku, K; Yabashi, M; Ishikawa, T; Yasui, A; Saitoh, Y; Narumi, Y; Kindo, K; Ebihara, T; Sekiyamab, A
PHYSICAL REVIEW B 98 ( 12 ) 121113\_1 - 121113\_6 2018年09月
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Valence fluctuating compound α-YbAlB<sub>4</sub> studied by <SUP>174</SUP>Yb Mossbauer spectroscopy and X-ray diffraction using synchrotron radiation
Oura, M; Ikeda, S; Masuda, R; Kobayashi, Y; Seto, M; Yoda, Y; Hirao, N; Kawaguchi, SI; Ohishi, Y; Suzuki, S; Kuga, K; Nakatsuji, S; Kobayashi, H
PHYSICA B-CONDENSED MATTER 536 ( 1 ) 162 - 164 2018年05月
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Hole doping effect on the electronic structure of layered oxypnictide LaOMnAs
Higashiya, A; Nakagawa, K; Yamasaki, A; Nagai, K; Fujioka, S; Kanai, Y; Yamagami, K; Fujiwara, H; Sekiyama, A; Abozeed, A; Kadono, T; Imada, S; Kuga, K; Yabashi, M; Tamasaku, K; Ishikawa, T; Toyama, S; Takase, K
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 220 58 - 60 2017年10月
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Frustrated magnetism in the Heisenberg pyrochlore antiferromagnets <i>A</i>Yb<sub>2</sub><i>X</i><sub>4</sub> (<i>A</i> = Cd, Mg; <i>X</i> = S, Se)
Higo, T; Iritani, K; Halim, M; Higemoto, W; Ito, TU; Kuga, K; Kimura, K; Nakatsuji, S
PHYSICAL REVIEW B 95 ( 17 ) 174443-1 - 7 2017年05月
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Anisotropic Thermal Expansion of α-YbAlB<inf>4</inf>
Yosuke Matsumoto, K. Kuga, T. Tomita, R. Küchler, S. Nakatsuji
Journal of Physics: Conference Series 807 ( 2 ) 2017年04月
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Lifetime-Broadening-Suppressed X-ray Absorption Spectrum of β-YbAlB<sub>4</sub> Deduced from Yb 3<i>d</i> → 2<i>p</i> Resonant X-ray Emission Spectroscopy
Kawamura, N; Kanai, N; Hayashi, H; Matsuda, YH; Mizumaki, M; Kuga, K; Nakatsuji, S; Watanabe, S
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 ( 1 ) 014711-1 - 7 2017年01月
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Pressure-induced magnetic transition exceeding 30 K in the Yb-based heavy-fermion β-YbAlB<sub>4</sub>
Tomita, T; Kuga, K; Uwatoko, Y; Nakatsuji, S
PHYSICAL REVIEW B 94 ( 24 ) 245130-1 - 6 2016年12月
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Quantum criticality and inhomogeneous magnetic order in Fe-doped α-YbAlB<sub>4</sub>
MacLaughlin, DE; Kuga, K; Shu, L; Bernal, OO; Ho, PC; Nakatsuji, S; Huang, K; Ding, ZF; Tan, C; Zhang, J
PHYSICAL REVIEW B 93 ( 21 ) 214421-1 - 8 2016年06月