Abstract
The radial distribution function of two-dimensional Yukawa systems has been computed with the hypernetted chain equations and compared with molecular dynamics simulations. A comparison is also made with similar quantities in three-dimensional systems. The importance of the bridge function in two dimensions is illustrated. Collective behaviour is described in terms of the dynamic structure factor S(q, ω); inclusion of the local field correction G(q, ω) incorporates physics beyond the random phase approximation. Simulation results are compared with renormalized mean-field approximations G(q, ω) ≈ G(q, 0) and G(q, ω) ≈ G(q, ∞). These approximations fail to capture details of the spectrum.
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