Comment on “Dynamical Corrections to the DFT-LDA Electron Conductance in Nanoscale Systems”

A Comment on the Letter by Na Sai et al., Phys. Rev. Lett. 94, 186810 (2005). The authors of the Letter offer a Reply.

Figure 1

MVM junction separated at $d=3\mathrm{a}.\mathrm{u}.$ The electron charge density and the background positive charge density are represented by thin discontinuous lines. Important contributions to the integral of Eq. (1) (thick green dashed line) arise within the vacuum junction, where the electronic viscosity (solid line) is lower, tending to reduce the dynamical resistance. The value of viscosity used in Ref. 1 is indicated by ${\eta }_c$.