Ikoma Yoshifumi

イコマヨシフミ | Ikoma Yoshifumi

Affiliation and department：
Job title： Assistant Professor

Research field (4)： Material fabrication and microstructure control , Metallic materials , Crystal engineering , Applied materials

Research keywords (6)： Bulk nanograined semiconductor materials , Severe plastic deformation , 半導体ナノポア形成 , 半導体薄膜 , nanostructures , Si-based thin film growth

Research theme for competitive and other funds (11)：

2023 - 2026 Elucidation of polymorphs and novel properties of SiGe alloys developed by high-pressure phase transformations
2018 - 2021 Controlling of thermal and electron transport using high pressure torsion and its application to environmental friendly thermoelectric materials
2014 - 2019 Microstructual Control Using High-Pressure Allotropy
2013 - 2015 バルクナノ結晶粒半導体の新規創製
2011 - 2013 Formation of band-offset type transparent conductive oxide thin films

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Papers (84)：

Jungheum Yun, Eunwook Jeong, Guoqing Zhao, Sang-Geul Lee, Seung Min Yu, Jong-Seong Bae, Seung Zeon Han, Gun-Hwan Lee, Yoshifumi Ikoma, Eun-Ae Choi. Unconventional thickness dependence of electrical resistivity of silver film electrodes in substoichiometric oxidation states. Acta Materialia. 2024
Yoshifumi Ikoma. Structural and Functional Properties of Si and Related Semiconducting Materials Processed by High-Pressure Torsion. MATERIALS TRANSACTIONS. 2023. 64. 7. 1346-1352
Kazutoshi Takahashi, Yuki Umeda, Masaki Imamura, Marina Takaira, Yoshifumi Ikoma, Yasutomo Arai. Three-dimensional angle-resolved photoemission study of bulk SiGe single crystals. APL Materials. 2023. 11. 4. 041114-041114
Bin Xu, Yuxuan Liao, Zhenglong Fang, Yifei Li, Rulei Guo, Ryohei Nagahiro, Yoshifumi Ikoma, Masamichi Kohno, Junichiro Shiomi. Extremely suppressed thermal conductivity of large-scale nanocrystalline silicon through inhomogeneous internal strain engineering. Journal of Materials Chemistry A. 2023. 11. 35. 19017-19024
Yoshifumi Ikoma, Kensuke Matsuda, Keigo Yoshida, Marina Takaira, Masamichi Kohno. Electric, thermal, and optical properties of severely deformed Si processed by high-pressure torsion. Journal of Applied Physics. 2022

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MISC (3)：

Kaveh Edalati, Andrea Bachmaier, Victor A. Beloshenko, Yan Beygelzimer, Vladimir D. Blank, Walter J. Botta, Krzysztof Bryła, Jakub Čížek, Sergiy Divinski, Nariman A. Enikeev, et al. Nanomaterials by severe plastic deformation: review of historical developments and recent advances. Materials Research Letters. 2022. 10. 4. 163-256
UENUMA Mutsunori, IKOMA Yoshihumi, IWANAGA Tsuyoshi. Fabrication of a new Arrayed Waveguide Grating on SOI substrates. Kyushu University-Venture Business Laboratory annual report. 2004. 2004. 123-124
IKOMA Yoshihumi, WATANABE Fumiya, MOTOOKA Teruaki. SiC Thin Film Growth on Si Substrate for SiC Double Barrier Resonant Tunneling Devices. Kyushu University-Venture Business Laboratory annual report. 1996. 1996. 92-93

Lectures and oral presentations (215)：

高圧ひずみ加工によるGeの準安定相形成と比抵抗変化
(日本金属学会2022年秋期第171回講演大会 2022)
Traveling Liquidus-Zone育成Si<sub>1-x</sub>Ge<sub>x</sub>結晶へのビッカースインデンテーションによるラマンスペクトル変化
(日本金属学会2022年秋期第171回講演大会 2022)
高圧ねじり加工を施したナノシリコン焼結体の準安定相生成と電気・光学特性
(日本金属学会2022年秋期第171回講演大会 2022)
ナノ結晶析出Fe系非晶質合金の加圧によるβ緩和への影響
(日本金属学会2022年秋期第171回講演大会 2022)
高圧巨大ひずみ加工によるGeリッチSiGe結晶の準安定相形成
(日本金属学会2022年秋期第171回講演大会 2022)

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Education (4)：

- 1999 Kyushu University
- 1999 Kyushu University Graduate School, Division of Engineering
- 1994 Kyushu University School of Engineering
- 1994 Kyushu University Faculty of Engineering

Professional career (2)：

(BLANK) (Kyushu University)
(BLANK) (Kyushu University)

Awards (2)：

2019/10 - The 9th International Conference on Electronics, Communications and Networks (CECNet 2019) Best Oral Presentation
2012/06 - International Workshop on Bulk Nanostructured Metals Poster session award (Gold Award)

Association Membership(s) (3)：

TMS , 日本金属学会 , 応用物理学会

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