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Resonance enhancement of first- and second-order coherent phonons in metallic single-walled carbon nanotubes
http://hdl.handle.net/10131/8987
http://hdl.handle.net/10131/89872c64a8d2-7fc8-47fc-bc15-758638783126
名前 / ファイル | ライセンス | アクション |
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PhysRevB.90.235435.pdf (892.6 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2015-02-27 | |||||
タイトル | ||||||
タイトル | Resonance enhancement of first- and second-order coherent phonons 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 |
Sato, K.
× Sato, K.× Tahara, K.× Minami, Y.× Katayama, I.× Kawai, H.× Yanagi, K.× Takeda, J. |
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著者(ヨミ) | ||||||
識別子Scheme | WEKO | |||||
識別子 | 9 | |||||
識別子Scheme | e-Rad | |||||
識別子URI | https://kaken.nii.ac.jp/ja/search/?qm=60202165 | |||||
識別子 | 60202165 | |||||
姓名 | タケダ, ジュン | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 9 | |||||
識別子Scheme | e-Rad | |||||
識別子URI | https://kaken.nii.ac.jp/ja/search/?qm=60202165 | |||||
識別子 | 60202165 | |||||
姓名 | 武田, 淳 | |||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University / LxRay Company, Ltd. / Department of Applied Physics, National Defense Academy | ||||||
著者所属 | ||||||
Department of Physics, Tokyo Metropolitan University | ||||||
著者所属 | ||||||
Department of Physics, Tokyo Metropolitan University | ||||||
著者所属 | ||||||
Graduate School of Engineering, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | High-frequency coherent phonons resonantly excited inmetallic single-walled carbon nanotubes (M-SWCNTs)were investigated via spectrally resolved pump-probe spectroscopy using 7.5-fs laser pulses. In addition tofirst-order coherent phonons such as radial breathing mode (RBM) and M and G modes, we clearly observedsecond-order high-frequency coherent phonons of 2Dand 2Gmodes, which can be regarded as squeezed phonons.We found that the amplitudes of the RBM,Gand 2D modes were resonantly enhanced at specificwavelengths: themaximum resides at a wavelength whose energy is smaller than that of the van Hove singularities inM-SWCNTsby an amount corresponding to the phonon energy. Furthermore, the 2D mode has stronger enhancement than theother first-order Raman modes. These results indicate that the enhancement originates from a Stokes-stimulatedRaman-scattering process at van Hove singularities and that efficient resonance enhancement occurs for the 2Dmode, possibly through double resonance due to the trigonal warping effect and strong electron-phonon couplingdue to the Kohn anomaly. | |||||
書誌情報 |
PHYSICAL REVIEW B 巻 90, 号 23, 発行日 2014-12-29 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 10980121 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11187113 | |||||
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 |