Fig. 5: Raman measurements for extracting the strain value.
From: Global strain-induced scalar potential in graphene devices
Spatially averaged center frequency \({\bar{\omega }}_{{\rm{2D}}}\) of the Raman 2D peak plotted as a function of the displacement Δz. Black circles are data points. The error bars from the single Lorentzian fitting when extracting the center frequency of the Raman 2D peak are smaller than the data points. The red line is a linear fit to the data. The linear decrease with increasing Δz indicates an increasing average strain.
