The sheet resistance of graphene under contact and its effect on the derived specific contact resistivity

It is normally assumed that the sheet resistances under and outside the metal contact are identical when deriving specific contact resistivity of graphene from transmission line model. We considered the contact end resistance and obtained the sheet resistance under contact of 670Ω/□, which is much d...

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Bibliographic Details
Published in:Carbon (New York) 2015-02, Vol.82, p.500-505
Main Authors: Peng, Song-ang, Jin, Zhi, Ma, Peng, Zhang, Da-yong, Shi, Jing-yuan, Niu, Jie-bin, Wang, Xuan-yun, Wang, Shao-qing, Li, Mei, Liu, Xin-yu, Ye, Tian-chun, Zhang, Yan-hui, Chen, Zhi-ying, Yu, Guang-hui
Format: Article
Language:English
Subjects:
Carbon
Contact
Electrical resistivity
Graphene
Sheet metal
Transmission lines
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Summary:It is normally assumed that the sheet resistances under and outside the metal contact are identical when deriving specific contact resistivity of graphene from transmission line model. We considered the contact end resistance and obtained the sheet resistance under contact of 670Ω/□, which is much different from that outside the contact of 1840Ω/□. Considering the difference, the value of specific contact resistivity is determined to be 3.3×10−6Ωcm2, which is three times as large as the unmodified value. This indicates that the difference between the sheet resistances under and outside the contact affects the derived specific contact resistivity of graphene significantly.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2014.11.001