4

2009 (Tkatchenko−Scheffler) TS
The Tkatchenko−Scheffler model for van der Waals interactions (vdW) defines the $C_6^{AB}$ parameters in an ab-initio fashion. In TS model the vdW energy $E_{vdw}$ is defined as,
\begin{equation}
E_{vdW} = -\frac{1}{2}\sum_{A,B}f_{damp}\left(R_{AB},R^0_A,R^0_B\right...