Development of novel materials of atomic layers with Dirac fermions for realizing the next-generation ultrafast devices
| Project/Area Number |
18H03874
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Medium-sized Section 29:Applied condensed matter physics and related fields
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Matsuda Iwao 東京大学, 物性研究所, 准教授 (00343103)
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| Co-Investigator(Kenkyū-buntansha) |
近藤 剛弘 筑波大学, 数理物質系, 准教授 (70373305)
冨中 悟史 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (90468869)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥40,040,000 (Direct Cost: ¥30,800,000、Indirect Cost: ¥9,240,000)
Fiscal Year 2020: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Fiscal Year 2019: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Fiscal Year 2018: ¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
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| Keywords | 原子層 / ディラック電子 / ホウ素 / ダイナミクス / ボロフェン / ボロファン / グラフェン / 準結晶 / ディラック電子系 / 時間分解光電子分光 / トポロジー / ディラック / 表面 / 単原子シート / キャリアダイナミクス |
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| Outline of Final Research Achievements |
Toward the realization of ultra-high-speed devices, we have investigated novel atomic layers with Dirac fermions by focusing on derivatives of the boron monatomic sheet "borophene" or graphene. A quasi-crystalline bilayer graphene shows photo-induced transient voltage and the "twist angle" between layers seemingly influences the carrier dynamics significantly. In polymorphs of the HB sheet "borophane (HB)", based on topology, the one with a network of 5,7-membered rings was found to be Dirac nodal line semimetal. The material realizes a large carrier concentration and it can be used as an opto-electronic material for the GHz-THz band. The 6-membered ring borophane exhibits functionalities as a hydrogen transport material and as a chemical sensor.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、次世代材料だけでなく物質としても珍しいディラック電子系原子層について、準結晶２層グラフェンやボロファンなどの新規物質群を開拓し、それらの電子状態とキャリアダイナミクスを明らかにした。新しい物質の理解は物質科学の発展に大きく貢献し、学術的意義は高い。また、本研究では超高速デバイス、水素輸送、化学センサーなど新物質の機能性を見出した。これらは将来的に材料として我々の社会で利用されることが期待される。そして、本研究を通じて、我々は原子層と最先端の分析技術に関する２冊の英文教科書を出版し、科学知識のグローバルな普及に尽くした。
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Report
(4 results)
Research Products
(38 results)
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[Journal Article] Electronic structure of a (3×3)-ordered silicon layer on Al(111)2020
Author(s)
Sato Yusuke、Fukaya Yuki、Cameau Mathis、Kundu Asish K.、Shiga Daisuke、Yukawa Ryu、Horiba Koji、Chen Chin-Hsuan、Huang Angus、Jeng Horng-Tay、Ozaki Taisuke、Kumigashira Hiroshi、Niibe Masahito、Matsuda Iwao
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Journal Title
Physical Review Materials
Volume: 4
Issue: 6
Pages: 0640051-6
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Topological Dirac nodal loops in nonsymmorphic hydrogenated monolayer boron2020
Author(s)
N.T. Cuong, I. Tateishi, M. Cameau, M. Niibe, N. Umezawa, B. Slater, K. Yubuta, T. Kondo, M. Ogata, S. Okada, I. Matsuda,
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Journal Title
Phys. Rev. B
Volume: 101
Issue: 19
Pages: 195412-195412
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Time-resolved X-ray photoelectron diffraction using an angle-resolved time-of-flight electron analyzer2020
Author(s)
A. K. R. Ang, Y. Fukatsu, K. Kimura, Y. Yamamoto, T. Yonezawa, H. Nitta, A. Fleurence, S. Yamamoto, I. Matsuda, Y. Yamada-Takamura, and K. Hayashi
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Journal Title
Japanese Journal of Applied Physics
Volume: 49
Issue: 10
Pages: 100902-100902
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene2019
Author(s)
Takeshi Suzuki*, Takushi Iimori, Sung Joon Ahn, Yuhao Zhao, Mari Watanabe, Jiadi Xu, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Kento Suwa, Hirokazu Fukidome, Satoru Tanaka, Joung Real Ahn, Kozo Okazaki, Shik Shin, Fumio Komori*, Iwao Matsuda*
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Journal Title
ACS Nano
Volume: 13
Issue: 10
Pages: 11981-11987
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Symmetry-breaking and spin-blockage effects on carrier dynamics in single-layer tungsten diselenide2019
Author(s)
Ro-Ya Liu, Meng-Kai Lin, Peng Chen, Takeshi Suzuki, Pip C. J. Clark, Nathan Lewis, Cephise Cacho, Emma Springate, Chia-Seng Chang, Kozo Okazaki, Wendy Flavell*, Iwao Matsuda*, Tai-Chang Chiang*
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Journal Title
Phys. Rev. B
Volume: 100
Issue: 21
Pages: 214309-214309
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Superstructure-induced splitting of Dirac cones in silicene2019
Author(s)
B. Feng, H. Zhou, Y. Feng, H. Liu, S. He, I. Matsuda, L. Chen, E. F. Schwier, K. Shimada, S. Meng, and K. Wu
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Journal Title
Phys. Rev. Lett.
Volume: 印刷中
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Regulation of asymmetric interlayer distributions of carriers in Twisted Bilayer Graphene and dynamics2021
Author(s)
Yuhao Zhao, Takeshi Suzuki, Takushi Iimori, Sung Joon Ahn, Joung Real Ahn, Jiadi Xu, Qianhui Ren, Masami Fujisawa, Teruto Kanai, Jiro Itatani, Kozo Okazaki, Shik Shin, Hirokazu Fukidome, Fumio Komori, Iwao Matsuda
Organizer
日本物理学会第76回年次大会
Related Report
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