Tanaka-Ohya-Nakane Laboratory

Kosuke Takiguchi　　瀧口　耕介

Dept. of Electrical Engineering and Information Systems Grad. School of Engineering, The University of Tokyo D3

東京大学工学系研究科　電気系工学専攻　博士後期課程3年

日本学術振興会特別研究員　DC2　2020年度～

統合物質科学リーダー養成プログラム（MERIT）　７期

Education 学歴

2012年　　開成高等学校　卒業

2017年　　東京大学工学部電気電子工学科　卒業

卒業論文題目　「Fe/ MgO /IV 族強磁性半導体 Ge_1-xFe_x からなる磁気トンネル接合の形成と トンネル磁気抵抗効果の増大」

2019年　　東京大学工学系研究科電気系工学専攻修士課程修了

修士論文題目　”Giant gate-controlled proximity magnetoresistance in semiconductor-based ferromagnetic /nonmagnetic bilayers”「半導体を用いた強磁性/非磁性の二層構造におけるゲート変調可能な巨大近接磁気抵抗効果」

2019年～　東京大学工学系研究科電気系工学専攻博士後期課程在学

Research field 研究領域

• Spintronics
• Ferromagnetic semiconductor
• Topological materials
• Non-reciprocal phenomena
• Magnetotransport phenomena

Publication　査読付き論文

• Le Duc Anh, Kengo Takase, Takahiro Chiba, Yohei Kota, Kosuke Takiguchi, and Masaaki Tanaka, Elemental Topological Dirac Semimetal α-Sn with High Quantum Mobility Advanced Materials https://doi.org/10.1002/adma.202104645 (2021)
• Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, &amp Hideki Yamamoto, Structural and transport properties of highly Ru-deficient SrRu0.7O3thin films prepared by molecular beam epitaxy: comparison with stoichiometric SrRuO3 AIP Advances 11, 035226 (2021)
• Kosuke Takiguchi, Yuki K. Wakabayashi, Hiroshi Irie, Yoshiharu Krockenberger, Takuma Otsuka, Hiroshi Sawada, Sergey A. Nikolaev, Hena Das, Masaaki Tanaka, Yoshitaka Taniyasu & Hideki Yamamoto , Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide Nature Communications 11, 4969 (2020)
• Kengo Takase, Le Duc Anh, Kosuke Takiguchi, Masaaki Tanaka, Current-in-plane spin-valve magnetoresistance in ferromagnetic semiconductor (Ga,Fe)Sb heterostructures with high Curie temperature Applied Phyisics Letters 117, 092402 (2020)
• Kosuke Takiguchi, Le Duc Anh, Takahiro Chiba, Tomohiro Koyama, Daichi Chiba & Masaaki Tanaka
  “Giant gate-controlled proximity magnetoresistance in semiconductor-based ferromagnetic–non-magnetic bilayers” Nature Physics 15, 1134–1139 (2019)
• Kosuke Takiguchi, Yuki K. Wakabayashi, Kohei Okamoto, Masaaki Tanaka, and Shinobu Ohya
  “Fe concentration dependence of tunneling magnetoresistance in magnetic tunnel junctions using group-IV ferromagnetic semiconductor GeFe” AIP Advances 7, 105202 (2017)

Preprint　プレプリント

• Kosuke Takiguchi, Le Duc Anh, Takahiro Chiba, Ryota Fukuzawa, Takuji Takahashi, and Masaaki Tanaka
  “Giant gate-controlled odd-parity magnetoresistance in one-dimensional channels with a magnetic proximity effect” arXiv 2003.11731 (2020)
• Le Duc Anh, Kengo Takase, Takahiro Chiba, Yohei Kota, Kosuke Takiguchi, Masaaki Tanaka “Elemental topological Dirac semimetal α-Sn with high quantum mobility” arXiv 2105.13884 (2021)
• Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger, Toshihiro Nomura, Yoshimitsu Kohama, Hiroshi Irie, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, and Hideki Yamamoto “Quantum Limit Transport and Two-Dimensional Weyl Fermions in an Epitaxial Ferromagnetic Oxide” arXiv 2106.03292 (2021)

Awards　受賞

• 2018年春季応用物理学会 第9回英語講演奨励賞 受賞 K. Takiguchi, L. D. Anh, K. Okamoto, T. Takeda, T. Koyama, D. Chiba and M. Tanaka; “Large anisotropic magnetoresistance induced by a proximity effect in an InAs / (Ga,Fe)Sb quantum well heterostructure”, 第65回応用物理学会春季学術講演会, 20a-D104-8 ,早稲田大学, 2018年3月20日）
• 平成30年度東京大学工学系研究科長賞（研究）、電気系工学専攻優秀修士論文賞　受賞　論文題目 “Giant gate-controlled proximity magnetoresistance in semiconductor-based ferromagnetic /nonmagnetic bilayers”  
• 2020年秋季応用物理学会 講演奨励賞 受賞 瀧口耕介, 若林 勇希，入江 宏，クロッケンバーガー ヨシハル，大塚 琢馬，澤田 宏，ニコラエフ セルゲイ，ダス ヘナ，田中 雅明，谷保 芳孝，山本 秀樹 ; 「強磁性ペロブスカイト酸化物SrRuO₃ 高品質薄膜中でのワイルフェルミオンを示す量子伝導現象 」, （第49回応用物理学会秋季学術講演会, 8a-Z07-2 ,オンライン, 2020年9月8日）, NanoQuineでの紹介

Presentation 発表

International Conference 国際会議　▼

• K. Takiguchi, L. D. Anh, T, Chiba, T. Koyama, D. Chiba and M. Tanaka; “Giant gate-controlled proximity magnetoresistance in semiconductor- based ferromagnetic/nonmagnetic bilayers” The 10th International School and Conference on Spintronics and Quantum Information Technology, Chicago, 23-27 June 2019
• K. Takiguchi, L. D. Anh, T, Chiba, T. Koyama, D. Chiba and M. Tanaka; “Giant gate-controlled proximity magnetoresistance in semiconductor- based ferromagnetic/nonmagnetic bilayers” Compound Semiconductor Weeks 2019, WeD2-6, Nara, Japan, 19-23 May 2019
• K. Takiguchi, L. D. Anh, T. Koyama, D. Chiba and M. Tanaka; “Giant gate-controlled proximity magnetoresistance in semiconductor- based ferromagnetic/nonmagnetic bilayers” Center for Spintronics Research Network Annual Workshop, P6, Osaka, Japan, 13-15 December 2018
• K. Takiguchi, L. D. Anh, T. Koyama, D. Chiba and M. Tanaka; “Large anisotropic magnetoresistance induced by a proximity effect in an InAs/(Ga,Fe)Sb quantum well heterostructure” The 11th Vietnam – Japan Scientific Exchange Meeting, S04MSE03, Sendai, Japan, 15^th September 2018
• K. Takiguchi, L. D. Anh, K. Okamoto, T. Takeda, T. Koyama, D. Chiba and M. Tanaka; “Gate-voltage-controlled magnetoresistance induced by a proximity effect in (Ga,Fe)Sb / InAs bilayer heterostructures”, 10th International Conference on Physics　and　Applications　of　Spin-related　Phenomena in Solids, ThO17, Linz, Austria, 5-9 August 2018
• Kosuke Takiguchi, Yuki K. Wakabayashi, Kohei Okamoto, Masaaki Tanaka, and Shinobu Ohya;“Fe concentration dependence of tunneling magnetoresistance in magnetic tunnel junctions using group-IV ferromagnetic semiconductor GeFe”, The Vietnam – Japan Scientific Exchange Meeting 2017, B-04, Tokyo, Japan, 9th September, 2017.
• Kosuke Takiguchi, Yuki K. Wakabayashi, Kohei Okamoto, Yoshisuke Ban, Masaaki Tanaka, and Shinobu Ohya;”Increase of tunneling magnetoresistance in trilayer structures composed of group-IV ferromagnetic semiconductor Ge_1-xFe_x, MgO, and Fe”, The 9th International School and Conference on Spintronics and Quantum Information Technology, Poster No. 114, Fukuoka, Japan, 4-8 June, 2017

Domestic Conference 国内会議　▼

• K. Takiguchi, L. D. Anh, T. Chiba, and M. Tanaka “Giant rectification effect in semiconductor-based non-magnetic InAs / ferromagnetic (Ga,Fe)Sb bilayer heterostructures” 第80回秋季応用物理学会　北海道大学　18a-E216-2 2019年9月16日
• K. Takiguchi, L. D. Anh, K. Okamoto, T. Takeda, T. Koyama, D. Chiba and M. Tanaka; “Large anisotropic magnetoresistance induced by a proximity effect in an InAs / (Ga,Fe)Sb quantum well heterostructure”, 第65回応用物理学会春季学術講演会, 20a-D104-8 ,早稲田大学, 2018年3月20日
• 瀧口耕介、若林勇希、岡本浩平、伴芳祐、田中雅明、大矢忍；“Increase of tunneling magnetoresistance in trilayer structures composed of group-IV ferromagnetic semiconductor Ge1-xFex, MgO, and Fe”,第64回応用物理学会春季学術講演会,15a-501-3, パシフィコ横浜、2017年3月15日