Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC

Koichiro Ienaga; Takushi Iimori; Koichiro Yaji; Toshio Miyamachi; Shuhei Nakashima; Yukio Takahashi; Kohei Fukuma; Shingo Hayashi; Takashi Kajiwara; Anton Visikovskiy; Kazuhiko Mase; Kan Nakatsuji; Satoru Tanaka; Fumio Komori

doi:10.1021/acs.nanolett.7b00606

Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC

Koichiro Ienaga, Takushi Iimori, Koichiro Yaji, Toshio Miyamachi, Shuhei Nakashima, Yukio Takahashi, Kohei Fukuma, Shingo Hayashi, Takashi Kajiwara, Anton Visikovskiy, Kazuhiko Mase, Kan Nakatsuji, Satoru Tanaka, Fumio Komori

Applied Physics

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Local electron-phonon coupling of a one-dimensionally nanorippled graphene is studied on a SiC(0001) vicinal substrate. We have characterized local atomic and electronic structures of a periodically nanorippled graphene (3.4 nm period) prepared on a macrofacet of the 6H-SiC crystal using scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoelectron spectroscopy (ARPES). The rippled graphene on the macrofacets distributes homogeneously over the 6H-SiC substrate in a millimeter scale, and thus replica bands are detected by the macroscopic ARPES. The STM/STS results indicate the strength of electron-phonon coupling to the out-of-plane phonon at the K̄ points of graphene is periodically modified in accordance with the ripple structure. We propose an interface carbon nanostructure with graphene nanoribbons between the surface rippled graphene and the substrate SiC that periodically modifies the electron-phonon coupling in the surface graphene.

Original language	English
Pages (from-to)	3527-3532
Number of pages	6
Journal	Nano Letters
Volume	17
Issue number	6
DOIs	https://doi.org/10.1021/acs.nanolett.7b00606
Publication status	Published - Jun 14 2017

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.7b00606

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Ienaga, K., Iimori, T., Yaji, K., Miyamachi, T., Nakashima, S., Takahashi, Y., Fukuma, K., Hayashi, S., Kajiwara, T., Visikovskiy, A., Mase, K., Nakatsuji, K., Tanaka, S., & Komori, F. (2017). Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC. Nano Letters, 17(6), 3527-3532. https://doi.org/10.1021/acs.nanolett.7b00606

Ienaga, K, Iimori, T, Yaji, K, Miyamachi, T, Nakashima, S, Takahashi, Y, Fukuma, K, Hayashi, S, Kajiwara, T, Visikovskiy, A, Mase, K, Nakatsuji, K, Tanaka, S & Komori, F 2017, 'Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC', Nano Letters, vol. 17, no. 6, pp. 3527-3532. https://doi.org/10.1021/acs.nanolett.7b00606

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title = "Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC",

abstract = "Local electron-phonon coupling of a one-dimensionally nanorippled graphene is studied on a SiC(0001) vicinal substrate. We have characterized local atomic and electronic structures of a periodically nanorippled graphene (3.4 nm period) prepared on a macrofacet of the 6H-SiC crystal using scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoelectron spectroscopy (ARPES). The rippled graphene on the macrofacets distributes homogeneously over the 6H-SiC substrate in a millimeter scale, and thus replica bands are detected by the macroscopic ARPES. The STM/STS results indicate the strength of electron-phonon coupling to the out-of-plane phonon at the {\=K} points of graphene is periodically modified in accordance with the ripple structure. We propose an interface carbon nanostructure with graphene nanoribbons between the surface rippled graphene and the substrate SiC that periodically modifies the electron-phonon coupling in the surface graphene.",

author = "Koichiro Ienaga and Takushi Iimori and Koichiro Yaji and Toshio Miyamachi and Shuhei Nakashima and Yukio Takahashi and Kohei Fukuma and Shingo Hayashi and Takashi Kajiwara and Anton Visikovskiy and Kazuhiko Mase and Kan Nakatsuji and Satoru Tanaka and Fumio Komori",

note = "Funding Information: This work was partly supported by JSPS Grant-in-Aid for Scientific Research (B), Grant No. 26287061 and for Young Scientists (B), Grant No. 15K17675. The ARPES measurements were partly performed at BL-13B, Photon Factory, KEK, Japan (PF-PAC Grant No. 2015G685). Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

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doi = "10.1021/acs.nanolett.7b00606",

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AU - Ienaga, Koichiro

AU - Iimori, Takushi

AU - Yaji, Koichiro

AU - Miyamachi, Toshio

AU - Nakashima, Shuhei

AU - Takahashi, Yukio

AU - Fukuma, Kohei

AU - Hayashi, Shingo

AU - Kajiwara, Takashi

AU - Visikovskiy, Anton

AU - Mase, Kazuhiko

AU - Nakatsuji, Kan

AU - Tanaka, Satoru

AU - Komori, Fumio

N1 - Funding Information: This work was partly supported by JSPS Grant-in-Aid for Scientific Research (B), Grant No. 26287061 and for Young Scientists (B), Grant No. 15K17675. The ARPES measurements were partly performed at BL-13B, Photon Factory, KEK, Japan (PF-PAC Grant No. 2015G685). Publisher Copyright: © 2017 American Chemical Society.

PY - 2017/6/14

Y1 - 2017/6/14

N2 - Local electron-phonon coupling of a one-dimensionally nanorippled graphene is studied on a SiC(0001) vicinal substrate. We have characterized local atomic and electronic structures of a periodically nanorippled graphene (3.4 nm period) prepared on a macrofacet of the 6H-SiC crystal using scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoelectron spectroscopy (ARPES). The rippled graphene on the macrofacets distributes homogeneously over the 6H-SiC substrate in a millimeter scale, and thus replica bands are detected by the macroscopic ARPES. The STM/STS results indicate the strength of electron-phonon coupling to the out-of-plane phonon at the K̄ points of graphene is periodically modified in accordance with the ripple structure. We propose an interface carbon nanostructure with graphene nanoribbons between the surface rippled graphene and the substrate SiC that periodically modifies the electron-phonon coupling in the surface graphene.

AB - Local electron-phonon coupling of a one-dimensionally nanorippled graphene is studied on a SiC(0001) vicinal substrate. We have characterized local atomic and electronic structures of a periodically nanorippled graphene (3.4 nm period) prepared on a macrofacet of the 6H-SiC crystal using scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoelectron spectroscopy (ARPES). The rippled graphene on the macrofacets distributes homogeneously over the 6H-SiC substrate in a millimeter scale, and thus replica bands are detected by the macroscopic ARPES. The STM/STS results indicate the strength of electron-phonon coupling to the out-of-plane phonon at the K̄ points of graphene is periodically modified in accordance with the ripple structure. We propose an interface carbon nanostructure with graphene nanoribbons between the surface rippled graphene and the substrate SiC that periodically modifies the electron-phonon coupling in the surface graphene.

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Modulation of Electron-Phonon Coupling in One-Dimensionally Nanorippled Graphene on a Macrofacet of 6H-SiC

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