Raman Spectroscopy of atomic layer materials

• Project/Area Number: 15K17437
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Sendai National College of Technology
• Principal Investigator: Sato Kentaro 仙台高等専門学校, 総合工学科, 准教授 (90583550)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: グラフェン / 共鳴ラマン分光 / 原子層物質

Outline of Final Research Achievements

Graphene is an atomic layered material of carbon atoms. In this study, we show that the optical transition energy of twisted bilayer graphene can be tuned by modifying not only the rotation angle between two graphene layers but also the interlayer distance. Furthermore, we show the energies of the van Hove singularities generated by the Moire structure in twisted bilayer graphene from the analysis of the Raman spectra obtained from the resonance Raman spectroscopy.

Academic Significance and Societal Importance of the Research Achievements

原子層物質は、膜の数、種類、重ね方などの積層構造に性質が依存するため、これまでの物質にはない新しい性質の発現が期待されている。原子層物質であるグラフェンの積層構造と性質の関係の解明には共鳴ラマン分光が広く使われている。本研究成果はモアレ構造を持つ２層グラフェンの積層構造と性質の関係、共鳴ラマン分光から得られるラマンスペクトルの解析へ知見を与えると期待される。また、本研究で得られた知見は原子層物質の基礎研究や光エレクトロニクスへの応用が期待される。

Research Products

• [Int'l Joint Research] Universidade Federal de Minas Gerais/Universidade Presbiteriana Mackenzie(Brazil)
• [Int'l Joint Research] National Tsing Hua University(Taiwan)
• [Int'l Joint Research] Czechoslovak Academy of Sciences/Charles University in Prague(チェコ)
• [Int'l Joint Research] Universidad Complutense de Madrid(Spain)
• [Int'l Joint Research] Universidade Federal de Minas Gerais/Universidade Presbiteriana Mackenzie(Brazil)
• [Int'l Joint Research] National Tsing Hua University(Taiwan)
• [Int'l Joint Research] Federal University of Minas Gerais(ブラジル)
• [Int'l Joint Research] J. Heyrovsky Institute of Phys. Chem.(チェコ)
• [Journal Article] Raman Excitation Profile of the G-band Enhancement in Twisted Bilayer Graphene (2017)
  • Author(s): Eliel G. S. N.、Ribeiro H. B.、Sato K.、Saito R.、Lu Chun-Chieh、Chiu Po-Wen、Fantini C.、Righi A.、Pimenta M. A.
  • Journal Title: Brazilian Journal of Physics Volume: 47 Issue: 6 Pages: 589-593
  • DOI: 10.1007/s13538-017-0526-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fine tuning of optical transition energy of twisted bilayer graphene via interlayer distance modulation (2017)
  • Author(s): Elena del Corro, Miriam Pena-Alvarez, Kentaro Sato, Angel Morales-Garcia, Milan Bousa, Michal Mracko, Radek Kolman, Barbara Pacakova, Ladislav Kavan, Martin Kalbac, Otakar Frank
  • Journal Title: Physical Review B Volume: 95 Issue: 8
  • DOI: 10.1103/physrevb.95.085138
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Electronic properties modulation in 13C/12C twisted bilayer graphene via direct compression (2016)
  • Author(s): Elena del Corro, Kentaro Sato, Miriam Pena-Alvarez, Angel Morales-Garcia, Milan Bousa, Martin Kalbac, Otakar Frank
  • Organizer: IWEPNM 2016
  • Place of Presentation: Kirchberg in Tirol, Austria
  • Year and Date: 2016-02-28
  • Int'l Joint Research
• [Presentation] Resonance Raman Spectroscopy in Twisted Bilayer Graphene (2016)
  • Author(s): Eliel Gomes Silva Neto, Henrique Ribeiro, Ariete Righi, Cristiano Fantini, Kentaro Sato, Riichiro Saito, Po-Wen Chiu, Marcos Assuncao Pimenta
  • Organizer: ICORS 2016
  • Place of Presentation: Fabrica de Negocios Conference Center, Fortaleza, Brazil
  • Int'l Joint Research