Affiliation
Graduate School of Science and Technology Research Division
Kuga Kentaro
Degree
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博士（科学）
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修士（理学）
Campus Career
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Hirosaki University Graduate School of Science and Technology Research Division Assistant Professor
2024.11 ～ Now
Research Interests
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熱電効果
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熱電デバイス
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強相関電子
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シンクロトロン放射光
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光電子分光
Research Areas
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Natural Science / Magnetism, superconductivity and strongly correlated systems
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Nanotechnology/Materials / Inorganic materials and properties
Professional Memberships
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日本放射光学会
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日本物理学会
Papers
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Huge Peltier conductivity in valence fluctuating material Yb<sub>3</sub>Si<sub>5</sub>
Kuga, K., Hirata, K., Matsunami, M., Takeuchi, T.
Applied Physics Letters 123 ( 20 ) 2023.11
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Observation of a critical charge mode in a strange metal
Hisao Kobayashi, Yui Sakaguchi, Hayato Kitagawa, Momoko Oura, Shugo Ikeda, Kentaro Kuga, Shintaro Suzuki, Satoru Nakatsuji, Ryo Masuda, Yasuhiro Kobayashi, Makoto Seto, Yoshitaka Yoda, Kenji Tamasaku, Yashar Komijani, Premala Chandra, Piers Coleman
Science 379 ( 6635 ) 908 - 911 2023.3
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Anisotropy-driven quantum criticality in an intermediate valence system.
Mihael S Grbić, Eoin C T O'Farrell, Yosuke Matsumoto, Kentaro Kuga, Manuel Brando, Robert Küchler, Andriy H Nevidomskyy, Makoto Yoshida, Toshiro Sakakibara, Yohei Kono, Yasuyuki Shimura, Michael L Sutherland, Masashi Takigawa, Satoru Nakatsuji
Nature communications 13 ( 1 ) 2141 - 2141 2022.4
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Simultaneous enhancements of thermopower and electrical conductivity in quasi-one-dimensional α-YbAlB4 single crystal
Kentaro Kuga, Masaharu Matsunami, Saurabh Singh, Satoru Nakatsuji, Tsunehiro Takeuchi
Applied Physics Letters 119 ( 22 ) 2021.11
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Effect of Anisotropic Hybridization in YbAlB4 Probed by Linear Dichroism in Core-Level Hard X-Ray Photoemission Spectroscopy
Kentaro Kuga, Yuina Kanai, Hidenori Fujiwara, Kohei Yamagami, Satoru Hamamoto, Yuichi Aoyama, Akira Sekiyama, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Atsushi Yamasaki, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Satoru Nakatsuji, Takayuki Kiss
Physical Review Letters 123 ( 3 ) 036404 - 036404 2019.7
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Orbital hybridisation effects in B2 phase Cr doped Co2MnAl.
Swati Pathak, Saurabh Singh, S Khalid, Kentaro Kuga, Tsunehiro Takeuchi, R Bindu
Journal of physics. Condensed matter : an Institute of Physics journal 35 ( 39 ) 2023.10
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Lattice effects on the physical properties of half-doped perovskite ruthenates
Jaskirat Brar, Saurabh Singh, Kentaro Kuga, Priyamedha Sharma, M. Bharath, Tsunehiro Takeuchi, R. Bindu
JOURNAL OF PHYSICS-CONDENSED MATTER 35 ( 19 ) 2023.5
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Thermoelectric performance of Fe<sub>2</sub>V<sub>0.9</sub>W<sub>0.1</sub>Al thin films deposited on n-type Si substrates
Machda, F., Singh, S., Kuga, K., Ang, A.K.R., Matsunami, M., Takeuchi, T.
Japanese Journal of Applied Physics 62 ( 5 ) 2023.5
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Valence fluctuation in Yb<sub>3</sub>Si<sub>5</sub> probed by synchrotron X-ray photoemission spectroscopy
Kentaro Kuga, Masaharu Matsunami, Hidenori Fujiwara, Goro Nozue, Akane Ose, Akira Sekiyama, Akira Yasui, Satoru Hamamoto, Masaki Oura, Tsunehiro Takeuchi
Japanese Journal of Applied Physics 62 ( SD ) SD1014 - SD1014 2023.5
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Magneto-thermal conductivity effect and enhanced thermoelectric figure of merit in Ag2Te
Keisuke Hirata, Kentaro Kuga, Masaharu Matsunami, Minyue Zhu, Joseph P. Heremans, Tsunehiro Takeuchi
AIP Advances 13 ( 1 ) 2023.1
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Multicritical phase diagram of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>PrMn</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> with two interacting magnetic elements
Takahiro Urata, Yusuke Takahashi, Kentaro Kuga, Tsunehiro Takeuchi, Hiroshi Ikuta
Physical Review B 106 ( 18 ) 2022.11
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Synthesis and structural link to the electronic and magneto-transport properties of spin-orbit Mott insulator Sr2IrO4.
Priyamedha Sharma, Saurabh Singh, Kentaro Kuga, Tsunehiro Takeuchi, R Bindu
Journal of physics. Condensed matter : an Institute of Physics journal 34 ( 43 ) 2022.10
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Electronic structure of silver chalcogenides investigated by hard x-ray photoemission spectroscopy and density functional theory calculations
K. Sato, K. Hirata, S. Singh, K. Kuga, F. Ogawa, M. Matsunami, T. Takeuchi
Journal of Applied Physics 132 ( 4 ) 2022.7
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Pressure-induced changes of valence fluctuation in beta-YbAlB4 probed by x-ray
Yui Sakaguchi, Shugo Ikeda, Naomi Kawamura, Masaichiro Mizumaki, Kentaro Kuga, Shintaro Suzuki, Keita Sone, Satoru Nakatsuji, Hisao Kobayashi
PHYSICAL REVIEW B 105 ( 15 ) 2022.4
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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 p-Type Si-Ge Alloy for Thermoelectric Application
Omprakash Muthusamy, Saurabh Singh, Keisuke Hirata, Kentaro Kuga, Santhana Krishnan Harish, Masaru Shimomura, Masahiro Adachi, Yoshiyuki Yamamoto, Masaharu Matsunami, Tsunehiro Takeuchi
ACS Applied Electronic Materials 3 ( 12 ) 5621 - 5631 2021.12
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High-temperature antiferromagnetism in Yb based heavy fermion systems proximate to a Kondo insulator
Shintaro Suzuki, Kou Takubo, Kentaro Kuga, Wataru Higemoto, Takashi U. Ito, Takahiro Tomita, Yasuyuki Shimura, Yosuke Matsumoto, Cédric Bareille, Hiroki Wadati, Shik Shin, Satoru Nakatsuji
Physical Review Research 3 ( 2 ) 2021.5
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Strong in-plane anisotropy in the electronic structure of fixed-valence β- LuAlB4
Pascal Reiss, Jordan Baglo, Hong'En Tan, Xiaoye Chen, Sven Friedemann, Kentaro Kuga, F. Malte Grosche, Satoru Nakatsuji, Michael Sutherland
Physical Review B 102 ( 8 ) 2020.8
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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) 2020.3
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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 2020.3
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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 2020.3
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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 2020.2
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Linear polarization-dependent core-level photoemission spectroscopy in Yb-based valence fluctuating system
Kentaro Kuga, Yuina Kanai, Hidenori Fujiwara, Kohei Yamagami, Satoru Hamamoto, Yuichi Aoyama, Akira Sekiyama, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Atsushi Yamasaki, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Satoru Nakatsuji, Takayuki Kiss
Journal of Electron Spectroscopy and Related Phenomena 238 146889-1 - 4 2020.1
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Observation of the 4f ground-state symmetry in strongly correlated cubic Pr compounds probed by linearly polarized 3d core-level photoemission spectroscopy
S. Hamamoto, Y. Kanai, S. Fujioka, Y. Nakatani, H. Fujiwara, K. Kuga, T. Kiss, A. Higashiya, A. Yamasaki, S. Imada, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, H. Hidaka, T. Yanagisawa, H. Amitsuka, K. T. Matsumoto, T. Onimaru, T. Takabatake, A. Sekiyama
Journal of Electron Spectroscopy and Related Phenomena 238 146885-1 - 4 2020.1
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Thermoelectric properties and electronic structure for CePd<sub>3</sub> and related materials
Ogawa F., Kuga K., Hirata K., Matsunami M., Takeuchi T.
Meeting Abstracts of the Physical Society of Japan 75.1 ( 0 ) 1904 - 1904 2020
Review Papers
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共鳴硬X線光電子分光による価数揺動系物質α-Yb(Al<sub>1-x</sub>Fe<sub>x</sub>)B<sub>4</sub>の電子構造解析
西岡拓真, 久我健太郎, 藤原秀紀, 姫野良介, 笠原理加, 浜本諭, 西本幸平, 木須孝幸, 保井晃, 雀部矩正, 河村直己, 池永英司, 水牧仁一朗, 筒井智嗣, 三村功次郎, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 35th 2022
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重い電子系Yb化合物の熱電特性制御
岡田真由子, 尾川史武, 久我健太郎, 松波雅治, 竹内恒博
日本金属学会講演大会(Web) 168th 2021
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不均一価数揺動を示すYb化合物の光電子分光
松波雅治, 久我健太郎, 飯塚拓也, 竹内恒博
日本放射光学会年会・放射光科学合同シンポジウム(Web) 33rd 2020
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立方晶Pr化合物の内殻光電子線二色性による4f軌道対称性の決定
浜本諭, 浜本諭, 中田惟奈, 中田惟奈, 久我健太郎, 藤原秀紀, 藤原秀紀, 木須孝幸, 木須孝幸, 東谷篤志, 東谷篤志, 山崎篤志, 山崎篤志, 今田真, 今田真, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 日高宏之, 柳澤達也, 網塚浩, 松本圭介, 鬼丸孝博, 高畠敏郎, 関山明, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 33rd 2020
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内殻光電子スペクトル線二色性による量子臨界物質α-YbAl<sub>1-x</sub>Fe<sub>x</sub>B<sub>4</sub>の4f軌道対称性決定
久我健太郎, 中田惟奈, 中田惟奈, 藤原秀紀, 藤原秀紀, 山神光平, 山神光平, 濱本諭, 濱本諭, 青山雄一, 青山雄一, 関山明, 関山明, 東谷篤志, 東谷篤志, 門野利治, 門野利治, 今田真, 今田真, 山崎篤志, 山崎篤志, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 中辻知, 中辻知, 木須孝幸, 木須孝幸
日本放射光学会年会・放射光科学合同シンポジウム(Web) 33rd 2020
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共鳴硬X線光電子分光による価数揺動系物質β-YbAlB<sub>4</sub>およびα-YbAlB<sub>4</sub>の電子構造研究
姫野良介, 久我健太郎, 藤原秀紀, 浜本諭, 保井晃, 雀部矩正, 柴垣善則, 河村直己, 池永英司, 水牧仁一朗, 筒井智嗣, 木須孝幸, 三村功次郎, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 33rd 2020
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Magnetic circular dichroism of iron in hard X-ray photoemission spectroscopy under a magnetic field
Kondo Y., Fujiwara H., Hamamoto S., Kanai-Nakata Y., Kawada M., Takano S., Kuga K., Kiss T., Higashiya A., Yamasaki A., Imada M., Tanaka A., Tamasaku K., Yabashi M., Ishikawa T., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 2 ) 1241 - 1241 2019
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Determination of the ground-state 4f symmetry of YbNi<sub>2</sub>Ge<sub>2</sub> by linear dichroism in angle resolved core-level photoemission spectroscopy
Kashiuchi T., Kanai Y., Hamamoto S., Fujiwara H., Kuga K., Kiss T., Higashiya A., Yamasaki A., Imada S., Tanaka A., Tamasaku K., Yabashi M., Ishikawa T., Ebihara T., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 1994 - 1994 2019
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立方晶PrB<sub>6</sub>におけるPr4f電子状態を反映した磁場中硬X線内殻光電子線二色性の観測
浜本諭, 浜本諭, 金井惟奈, 金井惟奈, 藤原秀紀, 藤原秀紀, 木須孝幸, 木須孝幸, 久我健太郎, 東谷篤志, 東谷篤志, 山崎篤志, 山崎篤志, 今田真, 今田真, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 関山明, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 32nd 2019
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Observation of Pr 4f electronic state in incommensurate antiferromagnetic phase of PrB<sub>6</sub> probed by linear dichroism in core level photoemission under a magnetic field
Hamamoto Satoru, Kanai Y., Fujiwara H., Kiss T., Kuga K., Higashiya A., Yamasaki A., Imada S., Tanaka A., Tamasaku K., Yabashi M., Ishikawa T., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 2216 - 2216 2019
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硬X線光電子分光を用いた希土類化合物CeAgSb<sub>2</sub>の基底状態における電子状態の解明
近藤佑宥, 近藤佑宥, 金井惟奈, 金井惟奈, 濱本諭, 濱本諭, 藤原秀紀, 藤原秀紀, 川田萌樹, 川田萌樹, 樫内利幸, 樫内利幸, 高野彩佳, 高野彩佳, 久我健太郎, 木須孝幸, 木須孝幸, 東谷篤志, 東谷篤志, 門野利治, 門野利治, 今田真, 今田真, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 海老原孝雄, 関山明, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 32nd 2019
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Ground state local 4f symmetry in the tetragonal strongly correlated Ce compounds probed by polarized hard x-ray photoemission spectroscopy
Fujiwara H., Kondo Y., Hamamoto S., Kawada M., Aratani H., Nakatani Y., Kanai-Nakata Y., Kuga K., Kiss T., Yamasaki A., Higashiya A., Kadono T., Imada S., Tanaka A., Tamasaku K., Yabashi M., Ishikawa T., Yasui A., Saitoh Y., Ebihara T., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 2 ) 1554 - 1554 2019
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Electronic structure of half-metallic Heusler alloy Co2MnSi probed by linear polarized hard x-ray photoemission spectroscopy
Nishimoto K., Fujiwara H., Kanai-Nakata Y., Hamamoto S., Kuga K., Kiss T., Kadono T., Imada S., Higashiya A., Yamasaki A., Tamasaku K., Yabashi M., Ishikawa T., Suga S., Umetsu R. Y., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 2 ) 1240 - 1240 2019
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Crystalline Electric Field Ground State and Effect of Anisotropic Hybridization in YbAlB<sub>4</sub> Probed by Linear Dichroism in Core-Level Hard X-ray Photoemission Spectroscopy
Kuga K., Kanai Y., Fujiwara H., Yamagami K., Hamamoto S., Aoyama Y., Sekiyama A., Higashiya A., Kadono T., Imada S., Yamasaki A., Tanaka A., Tamasaku K., Yabashi M., Ishikawa T., Nakatsuji S., Kiss T.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 2221 - 2221 2019
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Electronic structure of the quantum critical material beta-YbAlB<sub>4</sub> probed by resonant hard x-ray photoemission spectroscopy
Himeno R., Kuga K., Fujiwara H., Hamamoto S., Yasui A., Sasabe N., Sibagaki Y., Kawamura N., Ikenaga E., Mizumaki M., Tsutsui S., Kiss T., Mimura K., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 2 ) 1902 - 1902 2019
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Observation of heterogeneous valence fluctuations in Yb<sub>5</sub>Si<sub>3</sub>
Matsunami M., Kuga K., Iizuka T., Takeuchi T.
Meeting Abstracts of the Physical Society of Japan 74 ( 2 ) 1787 - 1787 2019
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Determination of the 4f ground-state symmetry of a heavy fermion compound CeRu<sub>2</sub>Si<sub>2</sub> by linear dichroism in hard X-ray core-level photoemission spectroscopy
Kawada M., Nakatani Y., Aratani H., Kanai Y., Hamamoto S., Kondo H., Fujiwara H., Kuga K., Kiss T., Yamasaki A., Tanaka A., Tamasaku K., Yabashi M., Higashiya A., Isikawa T., Kadono T., Imada S., Ōnuki Y., Aoki D., Sekiyama A.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 1961 - 1961 2019
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Electronic States of Na-Si Clathrate of Type2 Studied by X-ray Photoemission Spectroscopy
Ishida T., Terashima D., Kadono T., Fujiwara H., Sekiyama A., Kuga K., Higashiya A., Yamasaki A., Sakamoto K., Kobayashi Y., Chishima M., Kanai Y., Hamamoto S., Nakagawa K., Tamasaku K., Yabashi M., Ishikawa T., Morito H., Imada S.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 1562 - 1562 2019
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角度分解内殻光電子線二色性を用いた価数揺動物質YbNi<sub>2</sub>Ge<sub>2</sub>における4f基底状態対称性の決定
樫内利幸, 樫内利幸, 金井惟奈, 金井惟奈, 濱本諭, 濱本諭, 藤原秀紀, 藤原秀紀, 久我健太郎, 木須孝幸, 木須孝幸, 東谷篤志, 東谷篤志, 山崎篤志, 山崎篤志, 門野利治, 門野利治, 今田真, 今田真, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 海老原孝雄, 関山明, 関山明
日本放射光学会年会・放射光科学合同シンポジウム(Web) 32nd 2019
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軟X線光電子分光による量子臨界物質YbCo<sub>2</sub>Ge<sub>4</sub>の電子状態分析
久我健太郎, 濱本諭, 濱本諭, 中谷泰博, 中谷泰博, 大浦正樹, 北川健太郎, 木須孝幸, 木須孝幸
日本放射光学会年会・放射光科学合同シンポジウム(Web) 32nd 2019
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Physical properties of heavy fermion compound α-YbAlB<sub>4</sub> at low temperatures with external magnetic fields Ⅱ
Kitagawa H., Oura M., Ikeda S., Tanaka Y., Tamasaku K., Masuda R., Kobayashi Y., Seto M., Yoda Y., Suzuki S., Kuga K., Nakatsuji S., Kobayashi H.
Meeting Abstracts of the Physical Society of Japan 74 ( 1 ) 1992 - 1992 2019