• 文献标题:   Evolution of the Raman spectra features of defective monolayer graphene in back-gate configuration: Experimental study
  • 文献类型:   Article
  • 作  者:   FATES R, REMMOUCHE R, BENKEDIDAH T, RASKIN JP
  • 作者关键词:   graphene, monolayer, doping, raman, defect, property
  • 出版物名称:   DIAMOND RELATED MATERIALS
  • ISSN:   0925-9635 EI 1879-0062
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.diamond.2023.109919 EA APR 2023
  • 出版年:   2023

▎ 摘  要

This work brings original measurements on the impact of carrier concentration on Raman features of defective graphene at various bottomgate voltages. We show that the D and 2D modes characteristics exhibit a significant dependence on gate voltage induced doping. For single layer defective graphene, we report new measurements with quite accurate trends of the variation of these both modes characteristics; specifically, the intensity, the line width and the position of the D-mode, and the line width and the position of the 2D-mode; as a function of the doping level. The D Raman spectra features show relevant and original trends of (i) the intensity, (ii) the width, (iii) the position and (iv) the D-to-G intensity ratio when doping is located near and/or far from the Dirac point. The 2D-mode position and width do not vary significantly for a moderate doping, nevertheless, the measure-ments of the 2D mode FWHM show new dependance that can be approximated by a parabolic trend centered around the charge neutrality point.