Boundary graphene layer effect on surface plasmon oscillations in a quantum plasma half-space
Raheleh Aboltaman,Mehran Shahmansouri
Figure 3. The normalized frequency of the surface Plasmon waves W with respect to the normalized wave number K, for different values of the Plasmonic coupling parameter H, as solid line refers to $H=0.1,$ dashed line refers to $H=0.2,$ and dotted line refer to $H=0.5.$ In this case $\beta \xi =0.11.$