Study on electronic properties of two-dimensional layered materials under high electric field
Project/Area Number |
17K05500
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics I
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Research Institution | Okayama University |
Principal Investigator |
Goto Hidenori 岡山大学, 異分野基礎科学研究所, 准教授 (90322669)
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Project Period (FY) |
2017-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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Keywords | グラフェン / 電界効果 / 二次元層状物質 / バンド制御 / イオン液体 / 電子移動 / 自己組織化単分子膜 / 分子吸着 / 物性実験 / メゾスコピック系 / 低温物性 / マイクロ・ナノデバイス / 2次元電子系 |
Outline of Final Research Achievements |
Purpose of this study is to investigate electronic properties of two-dimensional materials (2DMs) under perpendicular electric field. To produce large homogeneous electric field, we have combined electron transfer method and electrostatic gating method. Using mono-/bi-layer graphene, we found that electron-transfer molecules produced inhomogeneous electric field and degraded the mobility. These disadvantages were solved as follows. First, the ionic liquid gate enabled us to produce homogeneous electric field because the movable ions were arranged to suppress the inhomogeneity. Next, molecules with high symmetry and small size had a tendency not to decrease the mobility. Furthermore, unique electric-field effect was found in doped topological insulator in which the mobility depended on the direction of the electric field. Our findings are useful for inducing novel electronic phenomena and producing multi-functional 2DM devices under electric field.
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Academic Significance and Societal Importance of the Research Achievements |
電界下における電子物性の研究には、トポロジカル物質における新規電磁現象のように、未踏の領域が広く残っている。その研究のためには、強く一様な電界の発生方法を開発することが必要である。電子移動および電界効果の2つの方法を用いたわれわれの研究成果により、この課題を解決する方針が見いだされた。これにより、二次元層状物質における新規電子物性の開拓や、自由度の高い電界制御による新たな多機能デバイスの創出が期待される。
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Report
(4 results)
Research Products
(32 results)
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[Journal Article] Superconducting behavior of a new metal iridate compound, SrIr2, under pressure2020
Author(s)
Xiaofan Yang, Huan Li, Tong He, Tomoya Taguchi, Yanan Wang, Hidenori Goto, Ritsuko Eguchi, Rie Horie, Kazumasa Horigane, Kaya Kobayashi, Jun Akimitsu, Hirofumi Ishii, Yen Fa Liao, Hitoshi Yamaoka, Yoshihiro Kubozono
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Journal Title
Journal of Physics Condensed Matter
Volume: 32
Issue: 2
Pages: 025704-025704
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Inhomogeneous superconductivity in thin crystals of FeSe1-xTex (x=1.0, 0.95, and 0.9)2020
Author(s)
Ritsuko Eguchi, Megumi Senda, Eri Uesugi, Hidenori Goto, Akihiko Fujiwara, Yasuhiko Imai, Shigeru Kimura, Takashi Noji, Yoji Koike, Yoshihiro Kubozono
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Journal Title
Materials Research Express
Volume: 7
Issue: 3
Pages: 036001-036001
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] Pressure-induced superconductivity in Bi2-xSbxTe3-ySey2019
Author(s)
Tong He, Xiaofan Yang, Tomoya Taguchi, Teppei Ueno, Kaya Kobayashi, Jun Akimitsu, Hitoshi Yamaoka, Hirofumi Ishii, Yen-Fa Liao, Hiromi Ota, Hidenori Goto, Ritsuko Eguchi, Kensei Terashima, Takayoshi Yokoya, Harald O. Jeschke, Xianxin Wu, Yoshihiro Kubozono
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Journal Title
PHYSICAL REVIEW B
Volume: 100
Issue: 9
Pages: 094525-094525
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Preparation and characterization of superconducting Ba1-xCsxTi2Sb2O, and its pressure dependence of superconductivity2019
Author(s)
Wang Yanan, Yang Xiaofan, Taguchi Tomoya, Li Huan, He Tong, Goto Hidenori, Eguchi Ritsuko, Miyazaki Takafumi, Liao Yen-Fa, Ishii Hirofumi, Kubozono Yoshihiro
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Journal Title
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume: 58
Issue: 11
Pages: 110603-110603
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Pressure-induced superconductivity in AgxBi2-xSe32018
Author(s)
Tong He, Xiaofan Yang, Takahiro Terao, Takaki Uchiyama, Teppei Ueno, Kaya Kobayashi, Jun Akimitsu, Takafumi Miyazaki, Takumi Nishioka, Koji Kimura, Kouichi Hayashi, Naohisa Happo, Hitoshi Yamaoka, Hirofumi Ishii, Yen-Fa Liao, Hiromi Ota, Hidenori Goto, and Yoshihiro Kubozono
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Journal Title
Physical Review B
Volume: 97
Issue: 10
Pages: 104503-104503
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C62017
Author(s)
Saki Nishiyama, Hidenori Fujita, Masatoshi Hoshi, Xiao Miao, Takahiro Terao, Takafumi Miyazaki, Hidenori Goto, Tomoko Kagayama, Katsuya Shimizu, Hitoshi Yamaoka, Hirofumi Ishii, Yen-Fa Liao and Yoshihiro Kubozono
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Journal Title
Scientific Reports
Volume: 7
Issue: 1
Pages: 7436-7446
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Bi2Se3へのAgドープの効果2018
Author(s)
内山 貴生, 後藤 秀徳, 上杉 英里, He Tong, 太田 弘道, 上野 哲平, 小林 夏野, 秋光 純, 久保園 芳博
Organizer
日本物理学会第73回年次大会(2018/3/22-25, 東京理科大学 野田キャンパス)
Related Report
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[Presentation] Doping effects on electronic properties of bilayer graphene2017
Author(s)
Hidenori Goto, Takaki Uchiyama, Yoko Nakashima, Hidehiko Akiyoshi, Ritsuko Eguchi, Hiroshi Osada, Takao Nishikawa, Yoshihiro Kubozono
Organizer
SUPERSTRIPES 2017, Quantum in Complex Matter: Superconductivity, Magnetism & Ferroelectricity (2017/6/4-10, Ischia, Naples, Italy)
Related Report
Int'l Joint Research / Invited
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