We investigate the plasma sscreening effects on the van der Waals two-body dispersion coefficients, C \(_{\textrm{6}}\) , for interactions among heliumlike atoms (Z \(=\) 2-10), using highly accurate correlated exponential wave functions. Two different plasma models, namely, the Debye plasma model and quantum plasma model are considered. The Debye-Hückel potential is used to model the Debye plasma environment, and the exponential cosine screened Coulomb potential is used to model the quantum plasma environment. The dispersion coefficients C \(_{\textrm{6}}\) for interactions among screened-heliumlike atoms (Z \(=\) 2-10) in their ground states for different screening parameters, are reported for the first time in the literature.
