A New Correlation Energy Interpolation Functional for Many‐Electron Systems in the Homogeneous Electron Gas Model. The Ratio of Paramagnetic and Ferromagnetic State Energies versus Gas Density | Zendy

Gritsenko O. V. | Zendy; Zhidomirov G. M. | Zendy

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A New Correlation Energy Interpolation Functional for Many‐Electron Systems in the Homogeneous Electron Gas Model. The Ratio of Paramagnetic and Ferromagnetic State Energies versus Gas Density

Author(s) -

Gritsenko O. V.,

Zhidomirov G. M.

Publication year - 1986

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221380117

Subject(s) - fermi gas , electron , ferromagnetism , paramagnetism , interpolation (computer graphics) , homogeneous , physics , electron density , atomic physics , condensed matter physics , chemistry , statistical physics , quantum mechanics , motion (physics) , classical mechanics

An interpolation method is suggested to calculated the correlation energies ϵ c P {ϱ} and ϵ c F {ϱ} of para‐ and ferromagnetic states of an homogeneous electron gas of any density ϱ. The functions ϵ c P {ϱ} and ϵ c F {ϱ} plotted in this method reproduce an exact dependence of correlation energy on gas, ϱ, in the limits within ϱ → infin; and ϱ → 0, as well as the empiric correlation energies of atoms. With the obtained functions, ϵ c Pand ϵ c F , the possibility of appearance and suppression of ferromagnetism when varying the density of electron gas is investigated. Paramagnetic susceptibility of gas as a function of ϱ is calculated, and the results obtained are compared with the experimental data for Na and K.

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