MANY-BODY LOCAL-FIELDS AND FERMI-LIQUID PARAMETERS IN A QUASI-2-DIMENSIONAL ELECTRON LIQUID

We present a quantitative theory of the quasiparticle properties in a Fermi liquid. Our approach uses as an input our previous result for th e quasiparticle energy which incorporates the vertex corrections assoc iated with charge and spin-density fluctuations through suitably defin ed many-body local fields. The method is explicitly applied to the cas e of the quasi-two-dimensional electron liquid occurring in silicon in version layers. In particular, we discuss results for the effective ma ss m and the modified Lande factor g* (Wilson ratio) that are in reas onable agreement with reported findings. Our calculations are performe d by making use of a self-consistent static model for the many-body lo cal fields and are consequently free of arbitrary parameters.