Katsuaki Hashikuni

Profile Information

Affiliation: Assistant Professor, Faculty of Engineering, Kyushu University

Degree: 博士（理学）(Mar, 2021, 九州大学)

J-GLOBAL ID: 202101004050429597
researchmap Member ID: R000021027

Research Interests

thermoelectrics

Research History

Apr, 2019 - Mar, 2021

Japan Society for the Promotion of Science
Apr, 2021 - Mar, 2024

Assistant Professor, Faculty of Engineering Department of Electrical Engineering, Sanyo-Onoda City University
Apr, 2024 - Present

Assistant Professor, Faculty of Engineering, Kyushu University

Education

Apr, 2012 - Mar, 2016

Department of Physics, Faculty of Science, Hiroshima University
Apr, 2016 - Mar, 2018

Department of Quantum Matter, Graduate School of Advanced Sciences of Matter, Hiroshima University
Apr, 2018 - Mar, 2021

Department of Applied Science for Electronics and Materials, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

Awards

Sep, 2016

優秀講演賞, Thermoelectric properties and electronic band structure of n-type thiospinel Cu2MTi3S8 (M = Mn, Fe, Co, Ni), Thermoelectrics Society of Japan
Jun, 2016

The ITS Outstanding Poster Award, Cu2MTi3S8 (M = Mn, Fe, Co, Ni) thiospinels: environmentally benign n-type thermoelectric materials, International Thermoelectric Society

Katsuaki Hashikuni, Koichiro Suekuni, Hirotaka Nishiate, Michihiro Ohta, Toshiro Takabatake

Papers

密度汎関数理論によるGa-P同時ドープBa8Cu6Ge40クラスレートの電子構造の研究

阿武宏明, 橋國克明

山陽小野田市立山口東京理科大学紀要, 7 21-26, Mar, 2024 Peer-reviewed
スクッテルダイトCoSb3の電子特性と輸送特性

阿武宏明, 橋國克明

山陽小野田市立山口東京理科大学紀要, 6 23-30, Mar, 2023 Peer-reviewed
An effective synthesis route for high-performance α-MgAgSb thermoelectric material

Keita Toh, Koichiro Suekuni, Katsuaki Hashikuni, Hirotaka Nishiate, Ushin Anazawa, Chul-Ho Lee, Michitaka Ohtaki

Journal of Materials Science, 57(24) 11265-11273, May 26, 2022 Peer-reviewed
密度汎関数理論計算によるBa8Cu6Ge40クラスレートの電子構造と輸送特性

阿武宏明, 橋國克明

山陽小野田市立山口東京理科大学紀要, 5 9-16, Mar, 2022 Peer-reviewed
Thermoelectric quaternary sulfide Cu2+Zn1−SnS4 (x = 0–0.3): Effects of Cu substitution for Zn

Bui Duc Long, Le Hong Thang, Nguyen Hong Hai, Koichiro Suekuni, Katsuaki Hashikuni, Tran Quang Minh Nhat, Wojciech Klich, Michitaka Ohtaki

Materials Science and Engineering: B, 272 115353-115353, Oct, 2021 Peer-reviewed
A comparative study of thermoelectric Cu2TrTi3S8 (Tr = Co and Sc) thiospinels: Enhanced Seebeck coefficient via electronic structure modification

Katsuaki Hashikuni, Koichiro Suekuni, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, Michitaka Ohtaki

Journal of Alloys and Compounds, 871 159548-159548, Aug, 2021 Peer-reviewedLead authorCorresponding author
Key Role of d0 and d10 Cations for the Design of Semiconducting Colusites: Large Thermoelectric ZT in Cu26Ti2Sb6S32 Compounds

Takashi Hagiwara, Koichiro Suekuni, Pierric Lemoine, Andrew R. Supka, Raju Chetty, Emmanuel Guilmeau, Bernard Raveau, Marco Fornari, Michihiro Ohta, Rabih Al Rahal Al Orabi …

Chemistry of Materials, 33(9) 3449-3456, May 11, 2021 Peer-reviewed
Electronic structure and thermoelectric properties of Sn1.2-xNbxTi0.8S3 with a quasi-one-dimensional structure

Koichiro Suekuni, Hidetomo Usui, Siying Qiao, Katsuaki Hashikuni, Tatsuya Hirano, Hirotaka Nishiate, Chul-Ho Lee, Kazuhiko Kuroki, Kosuke Watanabe, Michitaka Ohtaki

JOURNAL OF APPLIED PHYSICS, 125(17), May, 2019 Peer-reviewed
Thermoelectric Properties and Electronic Structures of CuTi2S4 Thiospinel and Its Derivatives: Structural Design for Spinel-Related Thermoelectric Materials

Katsuaki Hashikuni, Koichiro Suekuni, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Kazuhiko Kuroki, Toshiro Takabatake, Kosuke Watanabe, Michitaka Ohtaki

INORGANIC CHEMISTRY, 58(2) 1425-1432, Jan, 2019 Peer-reviewedLead authorCorresponding author
Atomic-scale phonon scatterers in thermoelectric colusites with a tetrahedral framework structure

Koichiro Suekuni, Yuta Shimizu, Eiji Nishibori, Hidetaka Kasai, Hikaru Saito, Daichi Yoshimoto, Katsuaki Hashikuni, Yohan Bouyrie, Raju Chetty, Michihiro Ohta …

JOURNAL OF MATERIALS CHEMISTRY A, 7(1) 228-235, Jan, 2019 Peer-reviewed
Carrier concentration tuning in thermoelectric thiospinel Cu2CoTi3S8 by oxidative extraction of copper

Katsuaki Hashikuni, Koichiro Suekuni, Kosuke Watanabe, Yohan Bouyrie, Michihiro Ohta, Michitaka Ohtaki, Toshiro Takabatake

JOURNAL OF SOLID STATE CHEMISTRY, 259 5-10, Mar, 2018 Peer-reviewedLead author
Retreat from Stress: Rattling in a Planar Coordination

Koichiro Suekuni, Chul Ho Lee, Hiromi I. Tanaka, Eiji Nishibori, Atsushi Nakamura, Hidetaka Kasai, Hitoshi Mori, Hidetomo Usui, Masayuki Ochi, Takumi Hasegawa …

ADVANCED MATERIALS, 30(13), Mar, 2018 Peer-reviewed
Effects of Ge and Sn substitution on the metal-semiconductor transition and thermoelectric properties of Cu12Sb4S13 tetrahedrite

Yasufumi Kosaka, Koichiro Suekuni, Katsuaki Hashikuni, Yohan Bouyrie, Michihiro Ohta, Toshiro Takabatake

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 19(13) 8874-8879, Apr, 2017 Peer-reviewed
High power factor in thiospinels Cu2TrTi3S8 (Tr = Mn, Fe, Co, Ni) arising from TiS6 octahedron network

Katsuaki Hashikuni, Koichiro Suekuni, Hidetomo Usui, Michihiro Ohta, Kazuhiko Kuroki, Toshiro Takabatake

APPLIED PHYSICS LETTERS, 109(18), Oct, 2016 Peer-reviewedLead author

Presentations

Stable Carrier Control of Carbon Nanotubes Using Electric Double Layer Electrets

Katsuaki Hashikuni, Ryu Inoue, Hiroaki Anno

40th International & 20th European Conference on Thermoelectrics, Jul 2, 2024
Effect of difference in particle size due to different synthesis conditions on thermoelectric properties of Co2Ge3S3

Katsuaki Hashikuni, Hiroaki Anno

The 8th Phonon Engineering Workshop, May 17, 2024
真空熱処理によるカーボンナノチューブのpn極性変化と熱電特性

金光倫玖, 橋國克明, 阿武宏明

第20回日本熱電学会学術講演会, Sep 26, 2023
電気二重層エレクトレットを利用したカーボンナノチューブのキャリア制御

井上竜, 橋國克明, 阿武宏明

第20回日本熱電学会学術講演会, Sep 26, 2023
The influence of preparation conditions on thermoelectric properties of skutterudite-related Co2Ge3S3

Katsuaki Hashikuni, Hiroaki Anno

The 39th Annual International Conference on Thermoelectrics, Jun 24, 2023
Ba8Au6−xFexGe40クラスレートの熱電特性

中谷祐介, 橋國克明, 阿武宏明

第70回応用物理学会春季学術講演会, Mar 16, 2023
スクッテルダイト型硫化物Co2Ge3S3の合成条件と熱電特性

橋國克明, 阿武宏明

第70回応用物理学会春季学術講演会, Mar 16, 2023
Co2Ge3S3の熱電物性に及ぼす出発原料形状の影響

橋國克明, 阿武宏明

第19回日本熱電学会学術講演会, Aug 9, 2022
密度汎関数理論による2次元遷移金属ダイカルコゲナイドの熱電特性の層厚依存性の研究

吉田大貴, 橋國克明, 阿武宏明

Jul 30, 2022
Effects of heat treatment on thermoelectric properties of carbon nanotube thin films by spin coating method

Ryu Inoue, Katsuaki Hashikuni, Hiroaki Anno

Virtual Conference on Thermoelectrics 2022, Jul 20, 2022
Thermoelectric properties in composites of germanium and silicon-based clathrate by planetary ball milling

Hirotaka Ishizu, Katsuaki Hashikuni, Hiroaki Anno

Virtual Conference on Thermoelectrics 2022, Jul 20, 2022
Thermoelectric properties of two-dimensional titanium disulfide nanosheets studied by density functional theory

Daiki Yoshida, Katsuaki Hashikuni, Hiroaki Anno

Virtual Conference on Thermoelectrics 2022, Jul 20, 2022
Ba8Cu6Ge40クラスレートにおける欠陥の熱電特性へ及ぼす影響

阿武宏明, 橋國克明

第69回応用物理学会春季学術講演会, Mar 24, 2022
Thermoelectric Properties of p-type Ba8Au6Ge40 Clathrate

Yudai Koga, Katsuaki Hashikuni, Hiroaki Anno

1st Japan-France Virtual Workshop on Thermoelectrics, Sep 30, 2021
Thermoelectric properties of carbon nanotubes carrier-tuned by electric double layer techniques

Haruka Yoshida, Katsuaki Hashikuni, Hiroaki Anno

1st Japan-France Virtual Workshop on Thermoelectrics, Sep 29, 2021
Electronic structure modification for increasing the Seebeck coefficient of Cu2Ti4S8

Katsuaki Hashikuni, Koichiro Suekuni, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, Michitaka Ohtaki

1st Japan-France Virtual Workshop on Thermoelectrics, Sep 28, 2021
カーボンナノチューブにおける電気二重層技術による熱電特性の制御と最適化

吉田はるか, 橋國克明, 阿武宏明

第18回日本熱電学会学術講演会, Aug 24, 2021
p型Ba8CuxGe46−xクラスレートの熱電物性における最適キャリア濃度の推定

古賀雄大, 橋國克明, 阿武宏明

第18回日本熱電学会学術講演会, Aug 24, 2021
p型Ge系クラスレート半導体における熱電特性Cu組成依存性

古賀雄大, 橋國克明, 阿武宏明

2021年度応用物理・物理系学会中国四国支部合同学術講演会, Jul 31, 2021
電気二重層技術によりキャリア制御したカーボンナノチューブの熱電特性

吉田はるか, 橋國克明, 阿武宏明

2021年度応用物理・物理系学会中国四国支部合同学術講演会, Jul 31, 2021

Teaching Experience

Apr, 2021 - Mar, 2023

Practice of Programming 1 (Sanyo-Onoda City University)
Apr, 2021 - Mar, 2024

Exercises in Electrical & Electronic Circuits (Sanyo-Onoda City University)
Apr, 2021 - Mar, 2024

Experiments 1 in Electrical Engineering (Sanyo-Onoda City University)
Apr, 2023 - Mar, 2024

Practice of Programming 1 (Sanyo-Onoda City University)
Apr, 2024 - Present

機械工学実験第一 (九州大学)

Professional Memberships

May, 2016 - Present

Thermoelectrics Society of Japan
Feb, 2019 - Present

The Physical Society of Japan
Jan, 2020 - Present

The Japan Society of Applied Physics
Aug, 2024 - Present

The Heat Transfer Society of Japan

Research Projects

スクッテルダイト型硫化物の局所構造と熱電特性の関係の解明

科学研究費助成事業若手研究, 若手研究, 日本学術振興会, Apr, 2023 - Mar, 2026

橋國克明
硫化スピネル化合物をベースにした高性能な熱電変換物質の創製

科学研究費助成事業特別研究員奨励費, 特別研究員奨励費, 日本学術振興会, Apr, 2019 - Mar, 2021

橋國克明

Industrial Property Rights

特開2024-095138 クラスレート化合物、熱電変換材料およびその製造方法

山本潔, 山本貴博, 阿武宏明, 橋國克明

Profile Information

Research Interests

Research History

Education

Awards

Papers

Presentations

Teaching Experience

Professional Memberships

Research Projects

Industrial Property Rights

Menu

Coauthors