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Bias-induced modulation of ultrafast carrier dynamics in metallic single-walled carbon nanotubes
http://hdl.handle.net/10131/00012047
http://hdl.handle.net/10131/00012047221d2893-b3c2-454b-92d2-c23fc733ba7d
名前 / ファイル | ライセンス | アクション |
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prb97.075435.pdf (749.8 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-11-02 | |||||
タイトル | ||||||
タイトル | Bias-induced modulation of ultrafast carrier dynamics in metallic single-walled carbon nanotubes | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Maekawa, Keisuke
× Maekawa, Keisuke× Yanagi, Kazuhiro× Minami, Yasuo× Kitajima, Masahiro× Katayama, Ikufumi× Takeda, Jun |
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著者所属 | ||||||
Department of Physics, Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Science and Engineering, Tokyo Metropolitan University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering, Yokohama National University, Institute of Technology and Science, Graduate School of Advanced Technology and Science, Tokushima University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering, Yokohama National University, LxRay Co. Ltd., Department of Applied Physics, National Defense Academy | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The gate bias dependence of excited-state relaxation dynamics in metallic single-walled carbon nanotubes (MCNTs) was investigated using pump-probe transient absorption spectroscopy coupled with electrochemical doping through an ionic liquid. The transient transmittance decayed exponentially with the pump-probe delay time, whose value could be tuned via the Fermi-level modulation of Dirac electrons under a bias voltage. The obtained relaxation time was the shortest when the Fermi level was at the Dirac point of the MCNTs, and exhibited a U-shaped dependence on the bias voltage. Because optical dipole transitions between the Dirac bands are forbidden in MCNTs, the observed dynamics were attributed to carrier relaxation from the E11 band to the Dirac band. Using a model that considers the suppression of electron-electron scattering (impact ionization) due to Pauli blocking, we could qualitatively explain the obtained bias dependence of the relaxation time. | |||||
書誌情報 |
Physical Review B 巻 97, 号 7, p. 075435-1-075435-6, 発行日 2018-02-22 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 24699950 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevB.97.075435 | |||||
権利 | ||||||
権利情報 | ©2018 American Physical Society | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | American Physical Society |