Local Fermi wavevector

In Eq. (5.63), kp is the Fermi wavevector. This dielectric constant can be used in the framework of the specular scattering or semiclassical infinite-barrier (SCIB) model for planar metal surface [88]. Within the framework of such approach, the different descriptions of the metal response discussed so far (local dielectrics, hydrod3mamic dielectric function and Lindhard-Mermin dielectric function) can be compared. This has been done in Ref. [89] for the metal-induced non radiative rate of a molecule close to an Ag surface. The results are summarized in Fig. 5.9. 

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