PERTURBATION THEORY FOR ELECTRICAL RESISTIVITY OF LIQUID
Author(s): V.T.Shvets, S.Savenko, S.Datsko (Odesa State Academy of Refrigeration, 1/3 Dvorianskaia Str., 65026 Odesa, Ukraine)
Nearly free electron model is used for the $s$-electron subsystem of liquid transition metals. $d$-electrons are considered to be bound and serve as an additional scattering factor. Model Hamiltonian of the electron subsystem contains two small parameters: pseudopotential of $s$-electron-ion interaction, and $s$-$d$ hybridization potential. The linear response theory of Kubo and the method of two-time retarded Green functions are used to investigate the conductivity of the system. The perturbation series by two small system parameters are first derived for the electrical resistivity of liquid transition metals. To introduce the electron-electron interaction, a random phase approach is employed. The analysis of the second and the third terms of perturbation series is given. Their contribution to the electrical resistivity of all liquid transition metals is estimated.
Key words: electroresistivity, metal
PACS: 72.14.E, 72.15.C
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