電界印加下でのナノカーボン電子物性解明

 

氏名:
岡田晋

所属:
筑波大学 数理物質系

概要:
本プロジェクトでは定常電界下におかれたナノスケールカーボン物質の電子物性の解明を目的として、密度汎関数理論に基づく第一原理計算の手法と有効遮蔽媒質法を組み合わせることにより、既存の周期系向けの電子状態計算コードを用いて、グラフェンやCNTの外部一様電界下における電子物性の解明を行った。
グラフェンリボンに平行に一様電界を印加することで、端の外側の真空領域に自由電子状態が発現し新たな伝導チャネルとなりえることを示した。また、CNTの薄膜においては、低いキャリアドープ時において印加電界と逆向きの電界が誘起されることを明らかにした。

 

論文掲載,発表実績:
(学術雑誌掲載論文)

  • 1. S. Kigure, S. Okada, ”Nano-Saturn: Theoretical Design of New C60 Inclusion Compounds” Jpn. J. Appl. Phys. 54, 06FF01 (2015).
    2. M. Maruyama, S. Okada, “Geometric and Electronic Structures of Polymerized C32 Fullerenes: Electronic Structure Tuning by Fullerene and Carbon Nanotube Filling”, Jpn. J. Appl. Phys. 54, 06FF02 (2015).
    3. U Ishiyama, N.-T. Cuong, S. Okada, “Threshold voltage variation for charge accumulation in carbon nanotube owing to monatomic defect arrangement” Jpn. J. Appl. Phys. 54, 06FF04 (2015).
    4. K. Narita, S. Okada, “Electronic structures of Decamethyl C60 under an Electric Field”, Jpn. J. Appl. Phys. 54, 06FF09 (2015).
    5. T. Igarashi, H. Kawai, K. Yanagi, N.-T. Cuong, S. Okada, T. Pichler, “Manipulation of Localized Transverse Surface Plasmon Resonance in Electricity-selected Single-wall Carbon Nanotubes by Electric Double Layer Carrier Injections”, Phys. Rev. Lett. 114, 176807 (2015).
    6. S. Kigure, H. Omachi, H. Shinohara, S. Okada, “Nano-Saturn: Energetics of the Inclusion Process of C60 into Cyclohexabiphenylene” J. Phys. Chem. C 119, 8931-8936 (2015).
    7. H. E. Lim, Y. Miyata, M. Fujihara, S. Okada, H. Omachi, R. Kitaura, H. Shinohara, “Fabrication and Optical Probing of Highly-Extended, Ultrathin Graphene Nanoribbons in Carbon Nanotubes”, ACS NANO 9, 5034 - 5040 (2015).
    8. U Ishiyama, N.-T. Cuong, S. Okada, “Influence of Defects for Carrier Injection In Carbon Nanotubes”, Jpn. J. Appl. Phys. 54, 065101 (2015).
    9. K. Narita, S. Okada, “Radical Spin Interaction in One-dimensional Chain of Decamethyl C60”, Chem. Phys. Lett. 634, 129-133 (2015).
    10. D. Matsumoto, K. Yanagi, T. Takenobu, S. Okada, K. Marumoto, “Electrically induced ambipolar spin vanishments in carbon nanotubes”, Scientific Rep. 5, 11859 (2015).
    11. M. Maruyama, N.-Thanh Cuong, S. Okada, “Geometric and electronic structures of two-dimensional networks of fused C36 fullerenes”, J. Phys. Sco. Jpn. 84, 084706 (2015).
    12. M. Nakamura, S. Yoshida, T. Katayama, A. Taninaka, Y. Mera, S. Okada, O. Takeuchi, H. Shigekawa, “Three-dimensional dynamic probe imaging mechanically activated switching of Si-based single-molecule junction” Nature Comm. 6, 8465 (2015).
    13. T. Kondo, D. Guo, T. Shikano, T. Suzuki, M. Sakurai, S. Okada, J. Nakamura, “Observation of Landau levels on nitrogen-doped flat graphite surfaces without external magnetic fields”, Scientific Rep. 5, 16412 (2015).
    14. K. M. Bui, V. A. Dinh, S. Okada, T. Ohno, “Hybrid functional study of the NASICON-type Na3V2 (PO4)3: Crystal and electronic structures, and polaron-Na vacancy complex diffusion”, Phys. Chem. Chem. Phys. 17, 30433-30439 (2015).
    15. K. Kishimoto, S. Okada, “Influence of the Defects on the Electronic Structures of Bilayer Graphene”, Surf. Sci. 644, 18-23 (2016).
    A. Yamanaka, S. Okada, “Energetics and electronic structures of graphene nanoribbons under a lateral electric field”, Carbon 96, 351-361 (2016).
    16. M. Maruyama, S. Okada, “Magnetic Properties of Graphene Quantum Dots Embedded in h-BN Sheet”, J. Phys. Chem. C 120, 1293-1302 (2016).
    A. Yamanaka, S. Okada, “Influence of electric field on electronic states of graphene nanoribbons under a FET structure”, Jpn. J. Appl. Phys. 55, 035101 (2016).
    17. P. Solis-Fernandez, S. Okada, T. Sato, M. Tsuji, H. Ago, “Gate-Tunable Dirac Point of Molecular Doped Graphene”, ACS Nano 10, 2930 - 2939 (2016).
    18. J. Sorimachi, S. Okada, “Influence of fullerene cages on energetics of dipole moment of encapsulated water molecule”, Jpn. J. Appl. Phys. 55, 04EP02 (2016).
    19. U Ishiyama, N.-T. Cuong, S. Okada, “Anomalous electrostatic potential properties in CNT thin films under a weak external electric field”, Appl. Phys. Express 9, 045101 (2016).
    20. K. Narita, S. Okada, “Geometric and electronic structures of corannulene polymers: Ultra narrow graphene ribbons with corrugation and topological defects”, Chem. Phys. Lett. 650, 76 - 81 (2016).

 




Posted : 2016年03月31日