Band-gap tuning of monolayer graphene by oxygen adsorption

Toru Takahashi; Katsuaki Sugawara; Eiichi Noguchi; Takafumi Sato; Takashi Takahashi

doi:10.1016/j.carbon.2014.02.049

Band-gap tuning of monolayer graphene by oxygen adsorption

Toru Takahashi, Katsuaki Sugawara, Eiichi Noguchi, Takafumi Sato, Takashi Takahashi

Tohoku University

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

34 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed monolayer graphene grown on 6H-SiC(0 0 0 1). We found that the energy gap between the π and π - bands gradually increases with oxygen adsorption to as high as 0.45 eV at the 2000 L oxygen exposure. A systematic shrinkage of the π - electron Fermi surface was also observed. The present result strongly suggests that the oxidization is a useful technique to create and control the band gap in monolayer graphene.

Original language	English
Pages (from-to)	141-145
Number of pages	5
Journal	Carbon
Volume	73
DOIs	https://doi.org/10.1016/j.carbon.2014.02.049
Publication status	Published - 2014 Jul

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10.1016/j.carbon.2014.02.049

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title = "Band-gap tuning of monolayer graphene by oxygen adsorption",

abstract = "We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed monolayer graphene grown on 6H-SiC(0 0 0 1). We found that the energy gap between the π and π - bands gradually increases with oxygen adsorption to as high as 0.45 eV at the 2000 L oxygen exposure. A systematic shrinkage of the π - electron Fermi surface was also observed. The present result strongly suggests that the oxidization is a useful technique to create and control the band gap in monolayer graphene.",

author = "Toru Takahashi and Katsuaki Sugawara and Eiichi Noguchi and Takafumi Sato and Takashi Takahashi",

note = "Funding Information: We thank T. J. Kleeman for his help in ARPES experiments. This work was supported by JSPS (KAKENHI 23224010 and 24740216 ) and MEXT (Grant-in-Aid for Scientific Research on Innovative Areas “Science of Atomic Layers” 25107003 ).",

year = "2014",

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doi = "10.1016/j.carbon.2014.02.049",

language = "English",

volume = "73",

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journal = "Carbon",

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T1 - Band-gap tuning of monolayer graphene by oxygen adsorption

AU - Takahashi, Toru

AU - Sugawara, Katsuaki

AU - Noguchi, Eiichi

AU - Sato, Takafumi

AU - Takahashi, Takashi

N1 - Funding Information: We thank T. J. Kleeman for his help in ARPES experiments. This work was supported by JSPS (KAKENHI 23224010 and 24740216 ) and MEXT (Grant-in-Aid for Scientific Research on Innovative Areas “Science of Atomic Layers” 25107003 ).

PY - 2014/7

Y1 - 2014/7

N2 - We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed monolayer graphene grown on 6H-SiC(0 0 0 1). We found that the energy gap between the π and π - bands gradually increases with oxygen adsorption to as high as 0.45 eV at the 2000 L oxygen exposure. A systematic shrinkage of the π - electron Fermi surface was also observed. The present result strongly suggests that the oxidization is a useful technique to create and control the band gap in monolayer graphene.

AB - We have performed high-resolution angle-resolved photoemission spectroscopy of oxygen-adsorbed monolayer graphene grown on 6H-SiC(0 0 0 1). We found that the energy gap between the π and π - bands gradually increases with oxygen adsorption to as high as 0.45 eV at the 2000 L oxygen exposure. A systematic shrinkage of the π - electron Fermi surface was also observed. The present result strongly suggests that the oxidization is a useful technique to create and control the band gap in monolayer graphene.

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SN - 0008-6223

VL - 73

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JO - Carbon

JF - Carbon

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Band-gap tuning of monolayer graphene by oxygen adsorption

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