Two-dimensional electron gas: correlation energy versus density and spin polarization

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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.
minor typos corrected, see also cond-mat/0109492

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/18416

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0110444
 http://arxiv.org/abs/cond-mat/0110444
 Int. J. Quantum Chem. 91, 126 (2003)

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arXiv