Journal of Physical Studies 7(4), 375–386 (2003) DOI: https://doi.org/10.30970/jps.07.375 CORRELATION EFFECTS ACCOUNTING IN THE ELECTRON LIQUID MODEL BY THE METHOD OF CYCLIC TRANSFORMATION M. Vavrukh, N. Tyshko, S. Koval', Ya. Kushtay Department for Astrophysics, Ivan Franko National University of Lviv, 8 Kyrylo i Mefodii Str., Lviv, UA-79005, Ukraine

The calculation of two-particle correlation function of the electron liquid model by means of the cyclic transformation is realized. In this way we reduce to the renormalized perturbation theory round the effective weak potential similar to quantum packet potential $e^2 r^{-1} \{ 1-(1+r^*) \exp (-2r^*)\}$ by $r^*\equiv rk_{\rm F}$, where $k_{\rm F}$ is Fermi wave-number. In the frames of this scheme the dynamic local field correction function, the mean energy and binary distribution function of electron liquid model are calculated. This method proved the model description of short-range correlation effects developed by the authors earlier. It is a simple and effective way of calculating electronic properties in metallic systems.

PACS number(s): 05.30.Fk

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