Shubnikov-de Haas measurements on a high mobility monolayer graphene flake sandwiched between boron nitride sheets

Naoki Matsumoto; Masaaki Mineharu; Masahiro Matsunaga; Chiashain Chuang; Yuichi Ochiai; Kenichi Oto; Gil Ho Kim; Kenji Watanabe; Takashi Taniguchi; David K. Ferry; Carlo R. Da Cunha; Nobuyuki Aoki

doi:10.1088/1361-648X/aa6d36

Shubnikov-de Haas measurements on a high mobility monolayer graphene flake sandwiched between boron nitride sheets

Naoki Matsumoto, Masaaki Mineharu, Masahiro Matsunaga, Chiashain Chuang, Yuichi Ochiai, Kenichi Oto, Gil Ho Kim, Kenji Watanabe, Takashi Taniguchi, David K. Ferry, Carlo R. Da Cunha, Nobuyuki Aoki

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4 Scopus citations

Abstract

A flake of monolayer graphene was sandwiched between boron nitride sheets. Temperature dependent Shubnikov-de Haas measurements were performed to access how this technique influences the electronic properties of the graphene sample. The maximum mobility found in this configuration was approximately 10⁵ cm² Vs ^-1. From the phase of the oscillations a Berry phase β of 1/2 was obtained indicating the presence of Dirac fermions. We obtained Fermi velocities around m s^-1 which imply hopping energies close to 2.5 eV. Furthermore, the carrier lifetime is typically higher than that found in graphene supported by SiO₂, reaching values higher than 700 fs.

Original language	English (US)
Article number	225301
Journal	Journal of Physics Condensed Matter
Volume	29
Issue number	22
DOIs	https://doi.org/10.1088/1361-648X/aa6d36
State	Published - Apr 28 2017
Externally published	Yes

Keywords

grapheme
Shubnikov-de Haas
transport

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1088/1361-648X/aa6d36

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Matsumoto, N., Mineharu, M., Matsunaga, M., Chuang, C., Ochiai, Y., Oto, K., Kim, G. H., Watanabe, K., Taniguchi, T., Ferry, D. K., Da Cunha, C. R., & Aoki, N. (2017). Shubnikov-de Haas measurements on a high mobility monolayer graphene flake sandwiched between boron nitride sheets. Journal of Physics Condensed Matter, 29(22), Article 225301. https://doi.org/10.1088/1361-648X/aa6d36

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abstract = "A flake of monolayer graphene was sandwiched between boron nitride sheets. Temperature dependent Shubnikov-de Haas measurements were performed to access how this technique influences the electronic properties of the graphene sample. The maximum mobility found in this configuration was approximately 105 cm2 Vs -1. From the phase of the oscillations a Berry phase β of 1/2 was obtained indicating the presence of Dirac fermions. We obtained Fermi velocities around m s-1 which imply hopping energies close to 2.5 eV. Furthermore, the carrier lifetime is typically higher than that found in graphene supported by SiO2, reaching values higher than 700 fs.",

keywords = "grapheme, Shubnikov-de Haas, transport",

author = "Naoki Matsumoto and Masaaki Mineharu and Masahiro Matsunaga and Chiashain Chuang and Yuichi Ochiai and Kenichi Oto and Kim, {Gil Ho} and Kenji Watanabe and Takashi Taniguchi and Ferry, {David K.} and {Da Cunha}, {Carlo R.} and Nobuyuki Aoki",

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AU - Matsumoto, Naoki

AU - Mineharu, Masaaki

AU - Matsunaga, Masahiro

AU - Chuang, Chiashain

AU - Ochiai, Yuichi

AU - Oto, Kenichi

AU - Kim, Gil Ho

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Ferry, David K.

AU - Da Cunha, Carlo R.

AU - Aoki, Nobuyuki

PY - 2017/4/28

Y1 - 2017/4/28

N2 - A flake of monolayer graphene was sandwiched between boron nitride sheets. Temperature dependent Shubnikov-de Haas measurements were performed to access how this technique influences the electronic properties of the graphene sample. The maximum mobility found in this configuration was approximately 105 cm2 Vs -1. From the phase of the oscillations a Berry phase β of 1/2 was obtained indicating the presence of Dirac fermions. We obtained Fermi velocities around m s-1 which imply hopping energies close to 2.5 eV. Furthermore, the carrier lifetime is typically higher than that found in graphene supported by SiO2, reaching values higher than 700 fs.

AB - A flake of monolayer graphene was sandwiched between boron nitride sheets. Temperature dependent Shubnikov-de Haas measurements were performed to access how this technique influences the electronic properties of the graphene sample. The maximum mobility found in this configuration was approximately 105 cm2 Vs -1. From the phase of the oscillations a Berry phase β of 1/2 was obtained indicating the presence of Dirac fermions. We obtained Fermi velocities around m s-1 which imply hopping energies close to 2.5 eV. Furthermore, the carrier lifetime is typically higher than that found in graphene supported by SiO2, reaching values higher than 700 fs.

KW - grapheme

KW - Shubnikov-de Haas

KW - transport

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JO - Journal of Physics Condensed Matter

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ER -

Shubnikov-de Haas measurements on a high mobility monolayer graphene flake sandwiched between boron nitride sheets

Abstract

Keywords

ASJC Scopus subject areas

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