▎ 摘　　要

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 670 Omega/square, which is much different from that outside the contact of 1840 Omega/square. Considering the difference, the value of specific contact resistivity is determined to be 3.3 x 10(-6) Omega cm(2), 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. (C) 2014 Elsevier Ltd. All rights reserved.