Hamaya Kohei

ハマヤコウヘイ | Hamaya Kohei

Affiliation and department：
Job title： Associate Professor

Research field (3)： Electric/electronic material engineering , Crystal engineering , Applied materials

Research keywords (4)：結晶成長 , 半導体工学 , スピントロニクス , Semiconductor spintronics

Research theme for competitive and other funds (28)：

2022 - 2027 Creation and development of superconducting computing technology for post-Moore era
2022 - 2027 Exploration of angular momentum current science and its application to spin-orbit electronics
2021 - 2026 Innovative metal/semiconductor-hybrid spintronic devices for nano-scale memory
2019 - 2024 Development of a germanium spin MOSFET
2019 - 2022 Creation of Germanium Circular-polarized LED toward Optical Encrypted Communication

2017 - 2022 Interconversion of Quantum States Between Photon and Electron Spin Using Electrically Controlled Quantum Dots

2018 - 2021 ホイスラー型新機能スピントロニクス材料の薄膜実証とその応用

2018 - 2020 Discovery of a flexible spin thin-film transistor

2016 - 2020 Optical and electric-field control of pure spin current transport

2018 - 2020 フレキシブルスピンTFTの創製

2016 - 2019 Study of atomic level magnetization of spin device electrode by atomic force / scanning tunneling microscopy

2014 - 2019 Electrical spin conversion

2015 - 2018 Development of spintronic materials and devices on flexible substrates

2014 - 2017 低RA・高スピン偏極ソース/ドレイン電極の開発

2013 - 2016 Development of vertical-type spin MOSFET with Schottky source and drain

2012 - 2013 純スピン流を利用した半導体不揮発多値メモリの要素技術開発

2011 - 2013 強磁性合金薄膜の微小面内領域におけるスピン偏極率制御法の開発とその応用

2010 - 2013 強磁性合金上へのシリコンゲルマニウム単結晶成長と縦型スピン素子への応用

2009 - 2013 次世代半導体Geチャネルを利用した超低消費電力スピントランジスタの開発

2011 - 2012 Control of spin polarization of ferromagnetic alloys in a microscopic area in a Si platform

2010 - 2012 Epitaxial growth of SiGe films on ferromagnetic alloys and its application to vertical spin devices

2008 - 2011 Si系半導体ナノ構造を基礎とした単一電子スピントランジスタの開発

2008 - 2011 Dvelopment of single-electron spin transisotors with silicon-based nanostructures

2008 - 2009 Lateral spin transport in silicon-based low-dimensional systems

2007 - 2009 High-Quality Formation of SiGe on Flexible Substrates for Transistor Application

2006 - 2009 Growth of Ferromagnetic Silicide for Source/Drain Engineering

2006 - 2007 半導体量子ホール端状態を利用した核スピン制御と固体量子情報技術への応用

2006 - 2006 量子ホール端状態を利用したシリコン核スピン偏極技術の開発とその応用

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Papers (221)：

Jun Okabayashi, Takamasa Usami, Amran Mahfudh Yatmeidhy, Yuichi Murakami, Yu Shiratsuchi, Ryoichi Nakatani, Yoshihiro Gohda, Kohei Hamaya. Strain-induced specific orbital control in a Heusler alloy-based interfacial multiferroics. NPG Asia Materials. 2024. 16. 1
Y. Murakami, T. Usami, R. Watarai, Y. Shiratsuchi, T. Kanashima, R. Nakatani, Y. Gohda, K. Hamaya. Metastable Co3Mn/Fe/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures. Journal of Applied Physics. 2023. 134. 22
Shaojie Hu, Shinya Yamada, Po-Chun Chang, Wen-Chin Lin, Kohei Hamaya, Takashi Kimura. Efficient Electrical Manipulation of the Magnetization Process in an Epitaxially Controlled Co₂FeSi/BaTiO₃ Multiferroic Interface. Physical Review Applied. 2023. 20. 3. 034029-1-034029-8
Nozomi Soya, Michihiro Yamada, Kohei Hamaya, Kazuya Ando. Isotropic Spin Hall Effect in an Epitaxial Ferromagnet. Physical Review Letters. 2023. 131. 7. 076702-1-076702-6
Keisuke Yamamoto, Takuro Matsuo, Michihiro Yamada, Youya Wagatsuma, Kentaro Sawano, Kohei Hamaya. Electrical properties of a low-temperature fabricated Ge-based top-gate MOSFET structure with epitaxial ferromagnetic Heusler-alloy Schottky-tunnel source and drain. Materials Science in Semiconductor Processing. 2023. 167. 15. 107763

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MISC (111)：

杉浦由和, 菊岡柊也, 我妻勇哉, 金澤玲奈, 星裕介, 山田道洋, 浜屋宏平, 浜屋宏平, 澤野憲太郎. Influences of injection currents on room temperature EL emission peaks from Ge-on-Si (111) LEDs. 応用物理学会秋季学術講演会講演予稿集(CD-ROM). 2022. 83rd
加藤昌稔, 山田晋也, 山田晋也, 市川修平, 小林周平, 山田道洋, 山田道洋, 内藤貴大, 舘林潤, 藤原康文, et al. Spin transport in GaN using ferromagnetic Heusler alloy/n⁺-GaN Schottky tunnel contacts. 応用物理学会春季学術講演会講演予稿集(CD-ROM). 2022. 69th
山田敦也, 山田道洋, 山田道洋, 山田晋也, 山田晋也, 澤野憲太郎, 浜屋宏平, 浜屋宏平. Growth of high quality Ge layers on Co₂FeSi and enhancement in room-temperature magnetoresistance ratios for Ge-based vertical spin devices. 応用物理学会春季学術講演会講演予稿集(CD-ROM). 2022. 69th
杉浦由和, 我妻勇哉, 山田航大, 星裕介, 山田道洋, 浜屋宏平, 澤野憲太郎. Room temperature EL from strained Ge-on-Si(111) diode structure. 応用物理学会春季学術講演会講演予稿集(CD-ROM). 2021. 68th
杉浦由和, 佐々木雅至, 我妻勇哉, 山田航大, 星裕介, 山田道洋, 浜屋宏平, 澤野憲太郎. Enhancement of RT EL emission intensity in Ge-on-Si (111) diodes by annealing. 応用物理学会秋季学術講演会講演予稿集(CD-ROM). 2021. 82nd

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Lectures and oral presentations (36)：

Room-temperature magnetoresistance effect in high-quality ferromagnet/germanium Schottky-tunnel lateral spin devices
(THERMEC'2020 2021)
Room-temperature germanium spintronics developed by atomically controlled heterointerfaces (invited)
(The 44th Annual Conference on MAGNETISM in Japan, Symposium "Recent progress of spintronics and future materials 2020)
Study of spin relaxation in n<sup>+</sup>-Si channel layers
(応用物理学会春季学術講演会講演予稿集(CD-ROM) 2020)
Suppression of crack formation in strained SiGe layer by patterning of Ge-on-Si substrates
(応用物理学会春季学術講演会講演予稿集(CD-ROM) 2020)
Germanium Spintronics for Room-Temperature Magnetoresistance Effect
(2019)

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Professional career (1)：

博士(工学) (東京工業大学)

Work history (11)：

2022/04 - 現在 Osaka University
2019/04 - 現在 Osaka University
2014/04 - 現在 Osaka University Graduate School of Engineering Science, Department of Systems Innovation Division of Mathematical Science
2023/04 - 2024/03 Hokkaido University
2010/01 - 2014/03 Kyushu University Faculty of Information Science and Electrical Engineering, Department of Information Electronics

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Committee career (2)：

2023/04 - 2024/03 公益社団法人応用物理学会第62期常任理事 (機関誌「応用物理」編集委員長)
2022/04 - 2023/03 公益社団法人応用物理学会第61期理事

Awards (10)：

2018/09 - (公) 応用物理学会応用物理学会優秀論文賞
2018/03 - (公) 応用物理学会第9回応用物理学会シリコンテクノロジー分科会論文賞
2014/04 - (財)船井情報科学振興財団第13回船井学術賞
2011/04 - 文部科学省平成23年度科学技術分野の文部科学大臣表彰若手科学者賞
2011/03 - (社)日本物理学会第5回日本物理学会若手奨励賞

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Association Membership(s) (3)：

日本金属学会 , 日本磁気学会 , 応用物理学会

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