Fig. 5: Temperature-dependent Raman studies.
From: Confinement epitaxy of large-area two-dimensional Sn at the graphene-SiC interface

a Representative temperature-dependent Raman spectra of the 2D band for the QFMLG/Sn sample. b–e TSRs of the G and 2D bands for the MLG and QFMLG/Sn samples; solid lines show linear fits. f Correlation plot of the G and 2D band TSRs for both surfaces. Dashed (blue, green) and dotted (orange) lines indicate the strain and doping trends, respectively. All data were acquired using 532 nm laser excitation.