Abstract
We have evaluated the density-density static response of the electron gas at zero temperature and in the metallic regime by diffusion Monte Carlo. The computed local field factor smoothly interpolates between the asymptotic small and large behavior, with a crossover around . In fact, appears to be almost completely given by its asymptotes, being accurately reproduced by the local density approximation to density functional theory for . We give a simple formula to reproduce at relevant values of the wave vector.
- Received 11 November 1994
DOI:https://doi.org/10.1103/PhysRevLett.75.689
©1995 American Physical Society