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Affiliation of Author(s):理学院

Journal:MODERN PHYSICS LETTERS B

Key Words:Graphene Raman spectra electron transfer

Abstract:We have investigated Raman spectra of the G and 2D lines of a single-layer graphene (SLG) with metallic contacts. The shift of the G and 2D lines is correlated to two different factors. Before performing annealing treatment or annealing under low temperature, the electron transfer on graphene surface is dominated by nonuniform strain effect. As the annealing treatment is enhanced, however, a suitable annealing treatment can eliminate the nonuniform strain effect where the relative work function (WF) between graphene and metal becomes a main factor to determine electronic transfer. Moreover, it is confirmed that the optimized annealing treatment can also decrease effectively the structural defect and induced disorder in graphene due to metallic contacts.

ISSN No.:0217-9849

Translation or Not:no

Date of Publication:2019-11-10

Co-author:yye,zwc,Wang, Caixia,Fang, Jining,Ma, Chunlan

Correspondence Author:陆地