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| Paper IPM / P / 6847 |
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We present an analytical expression for the static many-body local field factor G−(q) of a homogeneous two-dimensional electron gas, which reproduces Diffusion Monte Carlo data and embodies the exact asymptotic behaviors at both small and large wave number q. This allows us to also provide a closed-form expression for the spin-antisymmetric exchange and correlation kernel K−xc(r) which represents a key input for spin-density functional studies of inhomogeneous electronic systems.
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