2001/10/31 by Paola Gori-Giorgi, Claudio Attaccalite, Saverio Moroni +1
Physics and Astronomy · #cond-mat.str-el
published as Int. J. Quantum Chem. 91, 126 (2003) · minor typos corrected, see also cond-mat/0109492
arxiv created 2003/09/11 · arxiv updated 2009/11/30
We propose a simple analytic representation of the correlation energy for the two-dimensional electron gas, as a function of the density and the spin polarization. This new parametrization includes most of the known high- and low- density limits and fits our new fixed-node diffusion Monte Carlo simulations, performed for a wide range of electron densities and spin-polarization states. In this way we provide a reliable local-spin-density energy functional for two-dimensional systems. The corresponding correlation potential is discussed and compared with previous models.